Incredible calculus tools!

andrew.c

Chances are you'll probably have these in this forum somewhere already, but just in case you don't I linked them here!

Step-by-step derivative calculator

Integral calculator - will show the solution, you need to buy a password for the step-by-step version, but if your just interested in the final answer you get that for free!

Partial Fractions Generator - I find this really useful for quickly getting PF's for integration!

Theres a couple of other ones in there too - the links to the various calculators are at the top!
I find these very useful for checking homework answers/solutions halfway through a bigger problem to make sure I've not made stupid wee mistakes.

Enjoy!