\[ (2 x+1) y'(x)-4 e^{-y(x)}+2=0 \] ✓ Mathematica : cpu = 0.213651 (sec), leaf count = 21
\[\left \{\left \{y(x)\to \log \left (2-\frac {e^{c_1}}{2 x+1}\right )\right \}\right \}\] ✓ Maple : cpu = 0.185 (sec), leaf count = 31
\[y \relax (x ) = -\ln \left (\frac {2 x +1}{-1+\left (4 x +2\right ) {\mathrm e}^{2 c_{1}}}\right )-2 c_{1}\]