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.
n(n-1)(n-2)+150 =n( n+2)(n+1)
n(n-1)(n-2)+150 =n( n+2)(n+1)
Natural Language
Math Input
Extended Keyboard