Question Number 136859 by mathmax by abdo last updated on 27/Mar/21
$$\mathrm{calculate}\:\int_{\mathrm{0}} ^{\infty} \:\frac{\mathrm{cos}\left(\mathrm{cosx}\right)−\mathrm{sin}\left(\mathrm{sinx}\right)}{\mathrm{x}^{\mathrm{2}} \:+\mathrm{3}}\mathrm{dx} \\ $$