\[ \cos (x) y'(x)+y(x)+(\sin (x)+1) \cos (x)=0 \] ✓ Mathematica : cpu = 0.204179 (sec), leaf count = 53
\[\left \{\left \{y(x)\to e^{-2 \tanh ^{-1}\left (\tan \left (\frac {x}{2}\right )\right )} \left (\sin (x)+4 \log \left (\cos \left (\frac {x}{2}\right )-\sin \left (\frac {x}{2}\right )\right )\right )+c_1 e^{-2 \tanh ^{-1}\left (\tan \left (\frac {x}{2}\right )\right )}\right \}\right \}\] ✓ Maple : cpu = 0.106 (sec), leaf count = 29
\[ \left \{ y \left ( x \right ) ={\frac {\sin \left ( x \right ) +2\,\ln \left ( \cos \left ( x \right ) \right ) -2\,\ln \left ( \sec \left ( x \right ) +\tan \left ( x \right ) \right ) +{\it \_C1}}{\sec \left ( x \right ) +\tan \left ( x \right ) }} \right \} \]