2.1604   ODE No. 1604

1. Problem in Latex
2. Mathematica input
3. Maple input

$$y^{″}(x)-e^{y(x)}=0$$ ✓ Mathematica : cpu = 0.0853356 (sec), leaf count = 34

$$\left\{\{y(x)\to \log \left(\frac{1}{2}{c}_1({\tanh }^2\left(\frac{1}{2}\sqrt{c_1(c_2+x){}^2}\right)-1)\right)\}\right\}$$

✓ Maple : cpu = 0.42 (sec), leaf count = 23

$$\{y\left(x\right)=\ln \left(\frac{1}{2{\mathit{\_}\mathit{C}\mathit{1}}^2}({(\tan \left(\frac{\mathit{\_}\mathit{C}\mathit{2}+x}{2\mathit{\_}\mathit{C}\mathit{1}}\right))}^2+1)\right)\}$$