Question Number 129228 by bramlexs22 last updated on 14/Jan/21
$$\:\mathrm{H}\:=\:\int\:\mathrm{tan}\:\mathrm{x}\:\mathrm{tan}\:\mathrm{2x}\:\mathrm{tan}\:\mathrm{3x}\:\mathrm{dx}\:? \\ $$
Commented by som(math1967) last updated on 14/Jan/21
$${Q}\:\mathrm{105440} \\ $$