Question Number 89316 by abdomathmax last updated on 16/Apr/20
$${calculate}\:\sum_{{n}=\mathrm{2}} ^{\infty} \:\:\:\frac{\mathrm{2}{n}+\mathrm{1}}{\left({n}ā\mathrm{1}\right)^{\mathrm{3}} \left({n}+\mathrm{1}\right)^{\mathrm{3}} } \\ $$
calculate-n-2-2n-1-n-1-3-n-1-3-