Question Number 142273 by liberty last updated on 29/May/21
$$\:\:\underset{\frac{\mathrm{1}}{\mathrm{3}}} {\overset{\mathrm{3}} {\int}}\:\frac{{x}+\mathrm{sin}\:\left({x}^{\mathrm{2}} −\frac{\mathrm{1}}{{x}^{\mathrm{2}} }\right)}{{x}\left(\mathrm{2}+\mathrm{cos}\:\left({x}+\frac{\mathrm{1}}{{x}}\right)\right)}\:{dx}\:? \\ $$
Commented by abdullahoudou last updated on 29/May/21
$${u}=\mathrm{1}/{x} \\ $$