((a^2 - 2 b^2 - 3 c^2 - 4)^2+2*(2*a*b)^2+3*(2*a*c)^2+4*(2*a)^2)/(a^2 + 2 b^2 + 3 c^2 + 4)^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.