Question Number 146365 by mathmax by abdo last updated on 13/Jul/21
$$\mathrm{calculate}\:\int_{\mathrm{0}} ^{\infty} \:\frac{\mathrm{arctan}\left(\mathrm{x}^{\mathrm{2}} \right)}{\mathrm{x}^{\mathrm{2}} \:+\mathrm{4}}\mathrm{dx} \\ $$
calculate-0-arctan-x-2-x-2-4-dx-