Question Number 79092 by mathmax by abdo last updated on 22/Jan/20
$${find}\:\int_{−\infty} ^{+\infty} \:\:\frac{{e}^{−{x}^{\mathrm{2}} } {arctan}\left({x}^{\mathrm{2}} +\mathrm{1}\right)}{{x}^{\mathrm{2}} \:+\mathrm{1}}{dx} \\ $$
find-e-x-2-arctan-x-2-1-x-2-1-dx-