2x^4+2(2xy)^2+2(y^2+2xz)^2+2(2xz+2yz)^2+2(z^2+2yz+2xy)^2+(2x^2+2y^2+2z^2)^2 where z=1/2-x-y

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.