Question Number 83010 by mathmax by abdo last updated on 26/Feb/20
$${calculate}\:\int_{\mathrm{0}} ^{\infty} \:\:\:\frac{{ch}\left({cos}\left(\mathrm{2}{x}\right)\right)}{\left({x}^{\mathrm{2}} \:+\mathrm{1}\right)^{\mathrm{2}} }{dx} \\ $$
calculate-0-ch-cos-2x-x-2-1-2-dx-