\[ y'(x)^2 \sin \left (y'(x)\right )-y(x)=0 \] ✓ Mathematica : cpu = 0.0516869 (sec), leaf count = 28
\[\text {Solve}\left [\left \{x=\text {K$\$$137367} \sin (\text {K$\$$137367})-\cos (\text {K$\$$137367})+c_1,y(x)=\text {K$\$$137367}^2 \sin (\text {K$\$$137367})\right \},\{y(x),\text {K$\$$137367}\}\right ]\] ✓ Maple : cpu = 0.219 (sec), leaf count = 32
\[ \left \{ x-\int ^{y \left ( x \right ) }\! \left ( {\it RootOf} \left ( \sin \left ( {\it \_Z} \right ) {{\it \_Z}}^{2}-{\it \_a} \right ) \right ) ^{-1}{d{\it \_a}}-{\it \_C1}=0,y \left ( x \right ) =0 \right \} \]