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.
(sum 2*36*n, n=3, n=14) + (sum 2*72*n, n=14, n=20)
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random