$$[(64)^{-2}]^{-3}\div[\{(-8)^{2}\}^{3}]^{2}$$
$1$
$$\frac{64^{6}}{\left(\left(\left(-8\right)^{2}\right)^{3}\right)^{2}}$$
$$\frac{64^{6}}{\left(\left(-8\right)^{6}\right)^{2}}$$
$$\frac{64^{6}}{\left(-8\right)^{12}}$$
$$\frac{68719476736}{\left(-8\right)^{12}}$$
$$\frac{68719476736}{68719476736}$$
$$1$$
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