\[ \sin (x) y'(x)+y(x)^2 \left (-\sin ^2(x)\right )+y(x) (\cos (x)-3 \sin (x))+4=0 \] ✓ Mathematica : cpu = 0.16743 (sec), leaf count = 27
\[\left \{\left \{y(x)\to -4 \csc (x)+\frac {\csc (x)}{\frac {1}{5}+c_1 e^{5 x}}\right \}\right \}\] ✓ Maple : cpu = 0.108 (sec), leaf count = 28
\[y \relax (x ) = \frac {-4 \,{\mathrm e}^{5 x} c_{1}-4}{\sin \relax (x ) \left ({\mathrm e}^{5 x} c_{1}-4\right )}\]