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