8.14   ODE No. 1604

$$\boxed{{\displaystyle \frac{{\mathrm{d}}^2}{\mathrm{d}{x}^2}y\left(x\right)-{\mathrm{e}}^{y\left(x\right)}=0}}$$

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

Mathematica: cpu = 0.060508 (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 = 0.281 (sec), leaf count = 23 $$\{y\left(x\right)=\ln \left(\frac{1}{2{\mathit{\_}\mathit{C}\mathit{1}}^2}({(\tan \left(\frac{\mathit{\_}\mathit{C}\mathit{2}+x}{2\mathit{\_}\mathit{C}\mathit{1}}\right))}^2+1)\right)\}$$