0-tan-2-u-1-1-u-1-2-du-

Question Number 155016 by ArielVyny last updated on 24/Sep/21

$$\int_{\mathrm{0}} ^{\infty} {tan}^{\mathrm{2}} {u}\left(\mathrm{1}−\frac{\mathrm{1}}{\left({u}+\mathrm{1}\right)^{\mathrm{2}} }\right){du} \\ $$