\[
\boxed{
{\frac {\rm d}{{\rm d}x}}y \left( x \right) ={\frac {-4\,xy \left( x \right) -{x}^{3}+4\,{x}^{2}-4\,x+8}{8\,y \left( x \right) +2\,{x}^{2}-8\,x+8}}=0}
\]