Question Number 133125 by abdomsup last updated on 19/Feb/21
$${find}\:\int_{\mathrm{0}} ^{\infty} \:\frac{{cosx}\:{ch}\left(\mathrm{2}{x}\right)}{\left({x}^{\mathrm{2}} \:+{x}+\mathrm{3}\right)^{\mathrm{2}} }{dx} \\ $$
Commented by mathmax by abdo last updated on 20/Feb/21
$$\mathrm{the}\:\mathrm{Q}\:\mathrm{is}\:\mathrm{find}\:\int_{−\infty} ^{+\infty} \:\frac{\mathrm{cosxch}\left(\mathrm{2x}\right)}{\left(\mathrm{x}^{\mathrm{2}} \:+\mathrm{x}+\mathrm{3}\right)^{\mathrm{2}} }\mathrm{dx} \\ $$