8.16   ODE No. 1606

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

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

Mathematica: cpu = 1.086138 (sec), leaf count = 18 $$\text{DSolve}[y^{″}(x)+e^x\sin (y(x))=0,y(x),x]$$

Maple: cpu = 0.733 (sec), leaf count = 0 $$\text{could not solve}$$