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.
7100/(3*71)*(428*(3*1325^2-428^2)-3*1325^2*(1325-71)*arccos((1325-71)/1325))
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random