\[ y'(x)+y(x) \tan (x)-\sin (2 x)=0 \] ✓ Mathematica : cpu = 0.0245079 (sec), leaf count = 17
\[\left \{\left \{y(x)\to c_1 \cos (x)-2 \cos ^2(x)\right \}\right \}\]
✓ Maple : cpu = 0.013 (sec), leaf count = 15
\[ \left \{ y \left ( x \right ) =-2\, \left ( \cos \left ( x \right ) \right ) ^{2}+\cos \left ( x \right ) {\it \_C1} \right \} \]