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