\[
\boxed{
{\frac {\rm d}{{\rm d}x}}y \left( x \right) ={\frac {y \left( x \right)  \left( -3\,{x}^{3}y \left( x \right) -3+ \left( y \left( x \right)  \right) ^{2}{x}^{7} \right) }{x \left( {x}^{3}y \left( x \right) +1 \right) }}=0}
\]