Quick Reference Guide General Commands:   Symbols ? You can get help on most topics by typing ? followed by the name of the topic (be sure to end with a semicolon). := Assignments always use the symbol := (no space in between the colon and equal symbol). Once f is assigned, it will carry that value until you change it. It is like storing a value in a calculator which you can use repeatedly ; When you are done typing a command, you MUST type a semicolon ; This tells the computer you are done with that command and prints the response : This tells the computer you are done with that command and does not print the response Commands diff Computes the derivative of an expression. dsolve Used to solve ordinary differential equation expand Expands an expression eval Evaluates evalf Evalutes using Floating-point arithmatic factor Factors a multivariate polynomial fsolve Used to solve equations in decimal form int Allows you to integrate. (always indicate the variable with respect to which you integrate) plot This is used to plot your solution on some interval. restart Clears the memory and starts over. simplify Applies simplification rules to the expression solve Solves equations sqrt Take the square root. sum Computes a formula for an indefinite or definite sum. limit Allows you to obtain the limits.