((y-1)y)^2 + 4(x-y-1)y^3 + 6y^2(x-y-1)(x-y) +2y(x-y-1)(x-y)(2x-2y-1) + ((x-y-1)(x-y))^2

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.