\[ y'(x) \left (x^2 \cos (y(x))+2 y(x) \sin (x)\right )+2 x \sin (y(x))+y(x)^2 \cos (x)=0 \] ✓ Mathematica : cpu = 0.0718982 (sec), leaf count = 21
\[\text {Solve}\left [c_1=x^2 \sin (y(x))+y(x)^2 \sin (x),y(x)\right ]\]
✓ Maple : cpu = 0.127 (sec), leaf count = 19
\[ \left \{ \left ( y \left ( x \right ) \right ) ^{2}\sin \left ( x \right ) +{x}^{2}\sin \left ( y \left ( x \right ) \right ) +{\it \_C1}=0 \right \} \]