\[ y'(x)=\left (y(x)-e^x\right )^2+e^x \] ✓ Mathematica : cpu = 0.0176486 (sec), leaf count = 17
\[\left \{\left \{y(x)\to \frac {1}{c_1-x}+e^x\right \}\right \}\] ✓ Maple : cpu = 0.145 (sec), leaf count = 14
\[ \left \{ y \left ( x \right ) ={{\rm e}^{x}}+ \left ( {\it \_C1}-x \right ) ^{-1} \right \} \]