\[ \left (x^2-1\right ) y'(x)+2 x y(x)-\cos (x)=0 \] ✓ Mathematica : cpu = 0.0245701 (sec), leaf count = 26
\[\left \{\left \{y(x)\to \frac {\sin (x)}{x^2-1}+\frac {c_1}{x^2-1}\right \}\right \}\] ✓ Maple : cpu = 0.01 (sec), leaf count = 19
\[y \relax (x ) = \frac {\sin \relax (x )+c_{1}}{\left (x -1\right ) \left (1+x \right )}\]