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.
1/4 (2n H(n)+n^2+n) - 1/4 (2n H(n)-n^2-n)
1/4 (2n H(n)+n^2+n) - 1/4 (2n H(n)-n^2-n)
Natural Language
Math Input
Extended Keyboard
