11.15   ODE No. 1927

$$\boxed{{\displaystyle \{\frac{{\mathrm{d}}^2}{\mathrm{d}{t}^2}x\left(t\right)=a{\mathrm{e}}^{2x\left(t\right)}-{\mathrm{e}}^{-x\left(t\right)}+{\mathrm{e}}^{-2x\left(t\right)}{(\cos \left(y\left(t\right)\right))}^2,\frac{{\mathrm{d}}^2}{\mathrm{d}{t}^2}y\left(t\right)={\mathrm{e}}^{-2x\left(t\right)}\sin \left(y\left(t\right)\right)\cos \left(y\left(t\right)\right)-\frac{\sin \left(y\left(t\right)\right)}{{(\cos \left(y\left(t\right)\right))}^3}\}}}$$

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

Mathematica: cpu = 0 (sec), leaf count = 0 $$\text{Hanged}$$

Maple: cpu = 0 (sec), leaf count = 0 $$\text{hanged}$$