Question Number 181879 by SEKRET last updated on 01/Dec/22
$$\:\:\:\int\:\:\frac{\boldsymbol{\mathrm{arccos}}\left(\boldsymbol{\mathrm{tg}}^{\mathrm{3}} \left(\mathrm{2}\boldsymbol{\mathrm{x}}\right)\right)}{\mathrm{1}+\mathrm{4}\boldsymbol{\mathrm{x}}^{\mathrm{2}} }\:\boldsymbol{\mathrm{dx}} \\ $$$$ \\ $$$$ \\ $$$$ \\ $$