Question Number 78135 by msup trace by abdo last updated on 14/Jan/20
$${explicit}\:{f}\left({x}\right)=\int_{\mathrm{0}} ^{\infty} \:\:\frac{{arctan}\left({xt}\right)}{{t}^{\mathrm{2}} +{x}^{\mathrm{2}} }{dt} \\ $$$${with}\:{x}>\mathrm{0} \\ $$
explicit-f-x-0-arctan-xt-t-2-x-2-dt-with-x-gt-0-