Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
int_0^1 (2 atan(2/(x^2-x-4))-a (4 x F /0xf, -^. 3x-3E 9$01/x d with 40� igits
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
