$$\frac{84^{3}+54^{3}}{138}+84\cdot54$$
$9972$
$$\frac{592704+54^{3}}{138}+84\times 54$$
$$\frac{592704+157464}{138}+84\times 54$$
$$\frac{750168}{138}+84\times 54$$
$$5436+84\times 54$$
$$5436+4536$$
$$9972$$
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$2^{2}\times 3^{2}\times 277$
