This summer I wrote a short SymPy tutorial that illustrates how a computer
algebra system can help you understand math and physics. Using SymPy you can solve all kinds of math problems, painlessly.
Check it:
Sympy tutorial (PDF, 12 pages)
Print this out, and try the examples using live.sympy.org. The topics covered are: high school math, calculus, mechanics, and linear algebra.
SymPy makes all math and physics calculation easy to handle, it can even make them fun! Learn the commands and you’ll do well on all your homework problems. Best of all, sympy is free and open source software so your learning and your calculations won’t cost you a dime!
