\[ x y'(x)-y(x)+x \tan \left (\frac {y(x)}{x}\right )=0 \] ✓ Mathematica : cpu = 0.198305 (sec), leaf count = 16
\[\left \{\left \{y(x)\to x \sin ^{-1}\left (\frac {e^{c_1}}{x}\right )\right \}\right \}\] ✓ Maple : cpu = 0.086 (sec), leaf count = 14
\[\left \{y \left (x \right ) = x \arcsin \left (\frac {1}{c_{1} x}\right )\right \}\]