Question Number 34866 by a.i msup by abdo last updated on 12/May/18
$${find}\:{f}\left({x}\right)=\int_{\mathrm{0}} ^{\infty} \:\frac{{arctan}\left({x}\left({t}\:+\frac{\mathrm{1}}{{t}}\right)\right)}{\mathrm{1}+{t}^{\mathrm{2}} }{dt}\: \\ $$
find-f-x-0-arctan-x-t-1-t-1-t-2-dt-