\[
\boxed{
{\frac {\rm d}{{\rm d}x}}y \left( x \right) ={\frac {-{\frac {i}{243}} \left( 54\,i{x}^{2}+81\, \left( y \left( x \right)  \right) ^{4}+18\,{x}^{4} \left( y \left( x \right)  \right) ^{2}+{x}^{8} \right) x}{y \left( x \right) }}=0}
\]