\[ x y'(x)+x \left (-e^{\frac {y(x)}{x}}\right )-y(x)-x=0 \] ✓ Mathematica : cpu = 0.0277913 (sec), leaf count = 21
\[\left \{\left \{y(x)\to -x \log \left (\frac {e^{-c_1}}{x}-1\right )\right \}\right \}\]
✓ Maple : cpu = 0.131 (sec), leaf count = 20
\[ \left \{ y \left ( x \right ) = \left ( \ln \left ( -{\frac {x}{-1+x{{\rm e}^{{\it \_C1}}}}} \right ) +{\it \_C1} \right ) x \right \} \]