Solve Calculus Problems Free

[mage lang=”en|es|en” source=”flickr”]solve calculus problems free[/mage]
Does someone know a FREE pre calculus solve problems program that I can download from internet?

totally free?? I’man exchange student in USA and pre calc is killing me, but since I’m in an host family, the computer is not mine!!!

As another poster said already, try

It’s a free site created by the creator and owner of Wolfram Mathematica, an extremely powerful computer-programming language that contains hundreds of thousands of algorithms to solve multiple levels of mathematics.

Solving Limits Algebraically – Calculus