8.19   ODE No. 1609

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

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

Mathematica: cpu = 0.035004 (sec), leaf count = 23 $$\text{DSolve}[a^2\sin (y(x))-bf(x)+y^{″}(x)=0,y(x),x]$$

Maple: cpu = 0.624 (sec), leaf count = 0 $$\text{could not solve}$$