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