\[ y'(x) (a y(x)+b x)+a b x y(x)+y'(x)^2=0 \] ✓ Mathematica : cpu = 0.0151063 (sec), leaf count = 29
\[\left \{\left \{y(x)\to c_1 e^{-a x}\right \},\left \{y(x)\to -\frac {b x^2}{2}+c_1\right \}\right \}\] ✓ Maple : cpu = 0.017 (sec), leaf count = 22
\[y \relax (x ) = {\mathrm e}^{-a x} c_{1}\]