\[ x y'(x)-y(x)+x \tan \left (\frac {y(x)}{x}\right )=0 \] ✓ Mathematica : cpu = 0.172197 (sec), leaf count = 16
\[\left \{\left \{y(x)\to x \sin ^{-1}\left (\frac {e^{c_1}}{x}\right )\right \}\right \}\] ✓ Maple : cpu = 0.049 (sec), leaf count = 14
\[ \left \{ y \left ( x \right ) =\arcsin \left ( {\frac {1}{{\it \_C1}\,x}} \right ) x \right \} \]