\[ y'(x)=\frac {1}{2} e^{-\frac {x^2}{2}} y(x) \left (2 e^{\frac {x^2}{4}} y(x)+2 e^{\frac {x^2}{2}}+e^{\frac {x^2}{2}} x+2 y(x)^2\right ) \] ✓ Mathematica : cpu = 0.465858 (sec), leaf count = 132
\[\text {Solve}\left [-\frac {7}{3} \text {RootSum}\left [-7 \text {$\#$1}^3+6 \sqrt [3]{-7} \text {$\#$1}-7\& ,\frac {\log \left (\frac {3 e^{-\frac {x^2}{2}} y(x)+e^{-\frac {x^2}{4}}}{\sqrt [3]{7} \sqrt [3]{-e^{-\frac {3 x^2}{4}}}}-\text {$\#$1}\right )}{2 \sqrt [3]{-7}-7 \text {$\#$1}^2}\& \right ]=\frac {1}{9} 7^{2/3} e^{\frac {x^2}{2}} \left (-e^{-\frac {3 x^2}{4}}\right )^{2/3} x+c_1,y(x)\right ]\] ✓ Maple : cpu = 0.315 (sec), leaf count = 145
\[\left \{-c_{1}+\frac {2 x}{3}+\frac {2 \sqrt {3}\, \arctan \left (\frac {\left (6 \,{\mathrm e}^{-\frac {x^{2}}{2}} y \left (x \right )+2 \,{\mathrm e}^{-\frac {x^{2}}{4}}\right ) \sqrt {3}\, {\mathrm e}^{\frac {x^{2}}{4}}}{9}+\frac {\sqrt {3}}{9}\right )}{9}-\frac {2 \ln \left (\left (18 \,{\mathrm e}^{-\frac {x^{2}}{2}} y \left (x \right )+6 \,{\mathrm e}^{-\frac {x^{2}}{4}}\right ) {\mathrm e}^{\frac {x^{2}}{4}}-6\right )}{3}+\frac {\ln \left (\frac {324 \left ({\mathrm e}^{-\frac {x^{2}}{2}} y \left (x \right )+\frac {{\mathrm e}^{-\frac {x^{2}}{4}}}{3}\right )^{2} {\mathrm e}^{\frac {x^{2}}{2}}}{7}+\frac {\left (108 \,{\mathrm e}^{-\frac {x^{2}}{2}} y \left (x \right )+36 \,{\mathrm e}^{-\frac {x^{2}}{4}}\right ) {\mathrm e}^{\frac {x^{2}}{4}}}{7}+36\right )}{3} = 0\right \}\]