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.
(r*(r+1))*(r+(r+1))-(r*(r^2-1)+(r+1)*((r+1)^2-1))
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random