Question Number 50370 by prof Abdo imad last updated on 16/Dec/18
$${prove}\:{that}\:\forall\:\left({x},{y}\right)\in{Z}^{\mathrm{2}} \\ $$$${x}^{\mathrm{19}} {y}−{xy}^{\mathrm{19}} \:{is}\:{divided}\:{by}\:\mathrm{798}. \\ $$
prove-that-x-y-Z-2-x-19-y-xy-19-is-divided-by-798-