Simplify the following expression:

$\displaystyle \frac{6v^2+6u^2+12uv}{3vx+3ux+4uw+4vw}$

there are four alphabets used, which are v, u ,x and w.

what i tried to do is

$\displaystyle \frac{6v^2+6u^2+12uv}{3vx+3ux+4uw+4vw}$

=$\displaystyle \frac{6v^2+6u(u+2v)}{(3x+4w)(v+u)}$

then...stuck...

i think it can be further simplified..........

any help is much appreciated....