Question Number 160219 by vvvv last updated on 26/Nov/21
$$\underset{\boldsymbol{{k}}=\mathrm{1}} {\overset{{n}} {\sum}}\underset{\boldsymbol{{i}}=\mathrm{1}} {\overset{{m}} {\prod}}\left(\boldsymbol{{i}}^{\mathrm{2}} −\boldsymbol{{k}}\right)\boldsymbol{{k}}^{\mathrm{4}} \\ $$$$\boldsymbol{\mathrm{how}}\:\boldsymbol{\mathrm{to}}\:\boldsymbol{{solving}}\:\boldsymbol{\mathrm{is}}\:\boldsymbol{\mathrm{programming}}\:\:\boldsymbol{\mathrm{C}}++ \\ $$