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.
4*Integrate[x^2 + y^2, {x, 0, 1}, {y, 0, Sqrt[1 - x^2]}]
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random