(6^7*6^3/6^5*6^2)^2
$$\left(\frac{6^7*6^3}{6^5*6^2}\right)^2\\\\ =\left(\frac{6^{10}}{6^7}\right)^2\\\\ =\left(6^3 \right)^2\\\\\ =6^6$$
$${{\mathtt{6}}}^{{\mathtt{6}}} = {\mathtt{46\,656}}$$