\[ a y(x) y'(x)+b y(x)^2+y(x) y''(x)-y'(x)^2=0 \] ✓ Mathematica : cpu = 0.0664731 (sec), leaf count = 31
\[\left \{\left \{y(x)\to c_2 e^{-\frac {b x}{a}-\frac {c_1 e^{-a x}}{a}}\right \}\right \}\] ✓ Maple : cpu = 1.037 (sec), leaf count = 39
\[y \relax (x ) = {\mathrm e}^{\frac {c_{1} {\mathrm e}^{-a x}}{a}} {\mathrm e}^{-\frac {b x}{a}} {\mathrm e}^{-\frac {c_{2}}{a}} {\mathrm e}^{\frac {b}{a^{2}}}\]