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