\[ \left (y(x)-x^2\right ) y'(x)-x=0 \] ✓ Mathematica : cpu = 0.0196397 (sec), leaf count = 29
\[\left \{\left \{y(x)\to \frac {1}{2} \left (W\left (-e^{c_1-2 x^2-1}\right )+1\right )+x^2\right \}\right \}\] ✓ Maple : cpu = 0.051 (sec), leaf count = 23
\[ \left \{ y \left ( x \right ) ={x}^{2}+{\frac {{\it lambertW} \left ( -4\,{\it \_C1}\,{{\rm e}^{-2\,{x}^{2}-1}} \right ) }{2}}+{\frac {1}{2}} \right \} \]