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