\[
\boxed{
{\frac {{\rm d}^{2}}{{\rm d}{x}^{2}}}y \left( x \right) =-{\frac { \left( {x}^{3}-1 \right) {\frac {\rm d}{{\rm d}x}}y \left( x \right) }{ \left( {x}^{3}+1 \right) x}}+{\frac {xy \left( x \right) }{{x}^{3}+1}}=0}
\]