Getting Started:
Make math and science easier (and more fun) with free graphing calculator programs and games from calculatorti.com. You can make the process of transfering the application to your calculator sweet and simple with Texas Instrument's handy TI connect software. Install it on your computer and grab your GraphLink Connection cable (USB cable) to plug in your calculator. Then you can start downloading any of our programs and games (Wow! There's a lot!) from our libraries to transfer and install them to your calculator. Have fun!Title:  Brief Desc.  Brief Description:  Req.  Requirements:  Category: 

Graphing Derivatives  TI84 Plus and TI83 Plus graphing calculator program for graphing derivatives 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Iterations of a Function  TI84 Plus and TI83 Plus graphing calculator program for calculating the itterations of a function. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Simpson Approximation: Area Under a Curve  TI84 Plus and TI83 Plus graphing calculator program. Uses Simpson method approximations to approximate the area under a curve. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Area Under Curve: Monte Carlo Method  TI84 Plus and TI83 Plus graphing calculator program. Calculates the area under a curve using the Monte Carlo method. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

College Algebra Notes  TI89 graphing calculator college algebra notes program. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Algebra ] 

Equation Form Converter  TI84 Plus and TI83 Plus graphing calculator program for converting equations between standard form, point slope form, and slope intercept form 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Derivative Approximation with Secant Line Slope  TI84 Plus and TI83 Plus graphing calculator program. Compares the secant line slope of a function to its derivative. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Slope Fields  TI84 Plus and TI83 Plus graphing calculator slope fields program. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Linear Interpolation  TI89 graphing calculator linear interpolation program. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Statistics ] 

Binomial Expansion  TI89 graphing calculator program for binomial expansion. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Algebra ] 

Area, Centroid and Volume of Circular Revolution of an Expression  TI84 Plus and TI83 Plus graphing calculator program. Calculates the area, centroid and volume of circular revolution of an expression. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Manipulating Functions  TI89 graphing calculator program for manipulating the graph of a function based on a changing variable. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Graphing ] 

Newton's Method of Approximation  TI84 Plus and TI83 Plus graphing calculator program for finding the zeros of a function using Newton's method of approximation. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Algebra Help  TI84 Plus and TI83 Plus graphing calculator Algebra help program for students in intermediate algebra courses. Contains multiple useful algebra functions. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Compounding Interest  TI89 graphing calculator compounding interest program. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ BusinessFinance ] 

Solving Geometry Equations  TI89 graphing calculator program for solving geometry equations. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Geometry ] 

Arc Length of a Function: Integration  TI84 Plus and TI83 Plus graphing calculator program. Calculates the arc length of a function by integration. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Normal Line Function Program  TI89 graphing calculator program for finding the equation of a normal line to a function at a point. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Algebra ] 

Integrals: Rectangle Approximation Methods and Trapezoid Method  TI84 Plus and TI83 Plus graphing calculator program. Estimates the integral of a function using the rectangle and trapezoid methods. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Calculus Programs and Notes  TI84 Plus and TI83 Plus graphing calculator program set. Contains calculus notes and several useful calculus programs. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Distance, Midpoint and Slope Formulas  TI89 graphing calculator program contains formulas for distance, midpoint and slope. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Geometry ] 

Delta and Epsilon  TI89 graphing calculator program for formally defining limits with epsilons and deltas. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Graphing Divided Functions  TI89 graphing calculator program for graphing divided functions. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Graphing ] 

Solving Systems of Linear Inequalities: Combination Method  TI84 Plus and TI83 Plus graphing calculator program for solving systems of inequalities. Uses the combination method. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Random Numbers Program  TI89 graphing calculator program for generating random numbers. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Statistics ] 

Limits Calculator  TI84 Plus and TI83 Plus graphing calculator limit calculator program. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Trigonometry Test/Exam Notes  TI89 graphing calculator program, contains trigonometry exam notes on key trigonometry concepts. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Trigonometry ] 

Differential Equation Solver: 2 Points  TI84 Plus and TI83 Plus graphing calculator program. Solves differential equations given 2 points. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Graphing Angles  TI89 graphing calculator program for graphing angles. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Geometry ] 

Triangle: Sides, Angles, Area, Altitude, Median & Bisectors  TI89 graphing calculator triangle program. Calculates Length of sides, angles, area, altitude, median and bisectors. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Trigonometry ] 

Find The Roots of A Function: Newton's Method  TI84 Plus and TI83 Plus graphing calculator program for finding the roots of a function using Newton's Method. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Sorting Data: Lists, Matrices and Strings  TI89 graphing calculator program for sorting statistical data. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Statistics ] 

Area of a Circle  TI89 graphing calculator program for calculating the area of a circle. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Geometry ] 

Unit Circle and Compound Interest  TI84 Plus and TI83 Plus graphing calculator program includes features for the unit circle and compound interest. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Parallel Equivalency of a Value  TI89 graphing calculator program for calculating the parallel equivalency of a value or variable 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Exponential Growth and Decay  TI84 Plus and TI83 Plus graphing calculator program calculates variables in the exponential growth formula. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Pythagorean Theorem  TI89 graphing calculator Pythagorean theorem program. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Trigonometry ] 

Statistics: Area Under a Curve  TI89 graphing calculator statistics program for calculating the area under a curve. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Statistics ] 

Equation of a Tangent Line to a Point in a Function  TI89 graphing calculator program, finds the equation of a tangent line in relation to a point in a function. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Trigonometry ] 

Geometry Points Solve  TI89 graphing calculator program for solving and distance, midpoint, xintercept and yintercept of a line given 2 points. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Geometry ] 

Digamma Function  TI89 graphing calculator program for solving the digamma function. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Line Equation Finder  TI89 graphing calculator program for finding the equation, slope, and intercepts of a line. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Algebra ] 

Secant Method: Roots of an Equation  TI84 Plus and TI83 Plus graphing calculator program finds the roots of an equation Using the secant method. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Harmonic Conjugate Solver  TI89 graphing calculator harmonic conjugate program. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Algebra ] 

Solve Any Equation  TI84 Plus and TI83 Plus graphing calculator program for solving any equation. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Dirichlet Eta Function  TI89 graphing calculator Dirichlet Eta program. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Algebra ] 

Systems of Differential Equations  TI89 graphing calculator program, solves systems of differential equations. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Roots of a Function: Newton's Method  TI84 Plus and TI83 Plus graphing calculator program finds the roots of a functions using Newton's method. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Finding the Discriminant of a Polynomial  TI84 Plus and TI83 Plus graphing calculator program for finding the discriminant of a polynomial. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Symbolic Derivative of a Function  TI89 graphing calculator program, finds the symbolic derivative of a function. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Solve the Gamma Function  TI84 Plus and TI83 Plus graphing calculator Gamma Function program. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

A+ Algebra Program  TI84 Plus and TI83 Plus graphing calculator algebra program. Includes quadratic formula, factoring, foil and more. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Cube solver  TI89 graphing calculator program for solving cubic equations. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Algebra ] 

HalfLife Decay Formula  TI89 graphing calculator half life decay formula program. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Algebra ] 

Curved Data Analysis: Power and Regression  TI89 graphing calculator program for analyzing statistical curve data. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Statistics ] 

Volume and Rotation of a Solid  TI84 Plus and TI83 Plus graphing calculator program for calculating the volume and rotation of a solid. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Trigonometry Functions  TI89 graphing calculator program, solves trigonometry functions. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Trigonometry ] 

Factor Trinomials & Whole Numbers; Multiply Binomials  TI84 Plus and TI83 Plus graphing calculator program for factoring polynomials and whole numbers and FOIL multiplication of binomials. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Fourier Series Program  TI89 graphing calculator program for creating fourier series. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Derivatives  Implicit and Explicit  Tangent Line of a Point  TI84 Plus and TI83 Plus graphing calculator program finds implicit and explicit derivatives and the tangent line of a point. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Integrals: Area Under a Curve, Area Between 2 Curves  TI84 Plus and TI83 Plus graphing calculator program for calculating the area under a curve and the area between 2 curves. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Equation, Slope, X Intercept and Y Intercept of a Line  TI84 Plus and TI83 Plus graphing calculator program for finding the slope, equation and intercepts of a line. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Algebra 2 Geometry  TI89 graphing calculator algebra and geometry program. Completing the square, prime number functions, temperature converter and more. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Algebra ] 

Number of Diagonals in a Polygon  TI89 graphing calculator program for finding the number of diagonals in a polygon. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Geometry ] 

Dirichlet Beta Function  TI89 graphing calculator Dirichlet Beta Function program. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Algebra ] 

Integration by Parts  TI89 graphing calculator program for integration by parts. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Area Under A Curve: Simpsons rule, Trapezoidal Rule, Upper and Lower Sums  TI84 Plus and TI83 Plus graphing calculator program for calculating Simpson's rule, trapezoidal rule, and upper and lower sum and area under a curve. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Graphing Angles  TI89 graphing calculator angle graphing program. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Graphing ] 

Basic Algebra Solver  TI84 Plus and TI83 Plus graphing calculator program for basic algebra. Includes cramer's rule, 3 variable solver, area of a triangle and several other ... 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Algebra: Quadratics, Factorials, Imaginary Numbers & More  TI84 Plus and TI83 Plus graphing calculator program for high school and college algebra. Includes equation simplifier, imaginary number simplifier, quadratic equation program and more. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Dividing Polynomials  TI84 Plus and TI83 Plus graphing calculator program for dividing polynomials 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Maclaurin Series  TI84 Plus and TI83 Plus graphing calculator program. Displays the 7 Maclaurin series. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Residue Values for Complex Integrals  TI89 graphing calculator program for finding residue values for solving complex integrals. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Multiply Factors or Polynomials  TI84 Plus and TI83 Plus graphing calculator program for multiplying factors or polynomials. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Hurwitz Zeta Function  TI89 graphing calculator program. Performs opperations related to the Hurwitz Zeta Function. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Bisection Method Function Solver  TI89 graphing calculator program for solving functions with the bisection method. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Algebra ] 

Polynomial Pattern of a Series  TI84 Plus and TI83 Plus graphing calculator program for calculating the polynomial pattern of a series. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Average Value of a Function  TI89 graphing calculator program for calculating the average value of a function. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Geometric Systems of Equations  TI89 graphing calculator program for solving geometric systems of equations. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Geometry ] 

Convergence of Divergence of a Series  TI84 Plus and TI83 Plus graphing calculator program for determining if a series converges or diverges 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Integral Approximation  TI89 graphing calculator program for integral approximation 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Learning and Recognizing Basic Functions  TI84 Plus and TI83 Plus graphing calculator program which helps students learn and recognize basic and common functions. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Euler's Method: Approximate Values of a Function  TI89 graphing calculator program, calculates approximate values of a function using Euler's method. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Calculus Area Finder  TI89 program for calculating area in calculus. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Standard Normal Distribution: ZScore  TI89 graphing calculator program for calculating normal distribution probability. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Statistics ] 

Arc Length of a Curve  TI84 Plus and TI83 Plus graphing calculator program. Calculates the arc length of a curve. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Geometric Area and Volume  TI89 graphing calculator program for calculating geometric area and volume of solids and polygons. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Geometry ] 

Homogeneous Differential Equations  TI89 graphing calculator program, solves homogeneous differential equations. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Area Under a Curve and Area Between 2 Curves  TI84 Plus and TI83 Plus graphing calculator program for calculating the area under a curve and the area between 2 curves. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Laplace Transform of a Derivative  TI89 graphing calculator program, calculates the Laplace transform of a derivative. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Chain Rule  TI89 graphing calculator chain rule program. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Solve First Derivative  TI89 graphing calculator program, solves the first derivative of a function. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Logarithms: Convert, Evaluate and Graphing  TI84 Plus and TI83 Plus graphing calculator program for converting, calculating ang graphing logs. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Geometry Basics  TI89 graphing calculator program for basic geometry problems. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Geometry ] 

Multiply Polynomials  TI89 graphing calculator program for multiplying polynomials. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Algebra ] 

Completing the Square  TI84 Plus and TI83 Plus graphing calculator program uses the completing the square method for solving quadratic equations. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Analyze and Graph Rational Functions  TI89 graphing calculator program for analyzing and graphing rational functions. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Sum or Difference between 2 Cubes  TI84 Plus and TI83 Plus graphing calculator program for calculating sums and differences of cubes. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Absolute Value 89  TI89 graphing calculator absolute value program. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Algebra ] 

Algebra and Geometry: Circles, Spheres and Triangles  TI84 Plus and TI83 Plus graphing calculator Algebra and geometry program, solves problems with circles, squares and triangles. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 