If you have ever experienced the joys of taking calculus you no doubt have found the joy of the indefinite integral to be boundless. This is a handy little web page to make them significantly less painful. It works like a charm. I spent a few minutes plugging functions from my old calc book into it and all the answers came up correct. The technology is built on the mathematica engine which has some interesting code running behind it. A link on the page will lead you programming inclined people to a good read.
Integrate me!!!!!!!