Question Number 29501 by abdo imad last updated on 09/Feb/18
$${find}\:\:\sum_{{n}=\mathrm{1}} ^{\infty} \:\:\:\frac{\mathrm{1}}{{n}^{\mathrm{2}} \left({n}+\mathrm{1}\right)^{\mathrm{2}} \left({n}+\mathrm{2}\right)^{\mathrm{2}} }. \\ $$
find-n-1-1-n-2-n-1-2-n-2-2-