\[ x^3 y'(x)-x^2 y(x)-y(x)^2=0 \] ✓ Mathematica : cpu = 0.0669753 (sec), leaf count = 17
\[\left \{\left \{y(x)\to \frac {x^2}{1+c_1 x}\right \}\right \}\] ✓ Maple : cpu = 0.01 (sec), leaf count = 15
\[ \left \{ y \left ( x \right ) ={\frac {{x}^{2}}{{\it \_C1}\,x+1}} \right \} \]