Integrals...(4)

Let $y(x)=\int_{\frac{\pi^2}{16}}^{x^2}\frac{\cos(x) \cos(\sqrt{\theta})}{1+\sin^2(\sqrt{\theta})}d\theta$

Value of $\frac{dy}{dx}$ at $x=\pi$ can be expressed as $n\pi$ find find $4n+1$