\[ \boxed { x{\frac {\rm d}{{\rm d}x}}y \left ( x \right ) -y \left ( x \right ) \ln \left ( y \left ( x \right ) \right ) =0} \]
Mathematica: cpu = 0.010501 (sec), leaf count = 13 \[ \left \{\left \{y(x)\to e^{e^{c_1} x}\right \}\right \} \]
Maple: cpu = 0.047 (sec), leaf count = 8 \[ \left \{ y \left ( x \right ) ={{\rm e}^{{\it \_C1}\,x}} \right \} \]