4.411   ODE No. 1411

$$\boxed{{\displaystyle \frac{{\mathrm{d}}^2}{\mathrm{d}{x}^2}y\left(x\right)=\frac{y\left(x\right)}{{\mathrm{e}}^x+1}=0}}$$

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

Mathematica: cpu = 0.333542 (sec), leaf count = 42 $$\left\{\{y(x)\to c_1(e^{-x}+1)+c_2{e}^{-x}(e^x\log (e^x+1)+\log (e^x+1)+1)\}\right\}$$

Maple: cpu = 0.016 (sec), leaf count = 27 $$\{y\left(x\right)=(({({\mathrm{e}}^x+1)}^{-1}+\ln ({\mathrm{e}}^x+1))\mathit{\_}\mathit{C}\mathit{1}+\mathit{\_}\mathit{C}\mathit{2})(1+{\left({\mathrm{e}}^x\right)}^{-1})\}$$