\[ y'(x) \left (x^2 \cos (y(x))+2 y(x) \sin (x)\right )+2 x \sin (y(x))+y(x)^2 \cos (x)=0 \] ✓ Mathematica : cpu = 0.247359 (sec), leaf count = 21
\[\text {Solve}\left [x^2 \sin (y(x))+y(x)^2 \sin (x)=c_1,y(x)\right ]\] ✓ Maple : cpu = 0.127 (sec), leaf count = 19
\[y \relax (x )^{2} \sin \relax (x )+\sin \left (y \relax (x )\right ) x^{2}+c_{1} = 0\]