\[ \boxed { {\frac {\rm d}{{\rm d}x}}y \left ( x \right ) ={\frac {-\sinh \left ( x \right ) +{x}^{2}\ln \left ( x \right ) +2\,y \left ( x \right ) \ln \left ( x \right ) x+\ln \left ( x \right ) + \left ( y \left ( x \right ) \right ) ^{2}\ln \left ( x \right ) }{\sinh \left ( x \right ) }}=0} \]
Mathematica: cpu = 0 (sec), leaf count = 0 \[ \text {Hanged} \]
Maple: cpu = 26.208 (sec), leaf count = 24 \[ \left \{ y \left ( x \right ) =-x-\tan \left ( {\it \_C1}-\int \!{\frac { \ln \left ( x \right ) }{\sinh \left ( x \right ) }}\,{\rm d}x \right ) \right \} \]