Answer
$\dfrac{262,144}{n^{30}}$
Work Step by Step
RECALL:
(i) $\left(\dfrac{x}{y}\right)^n=\dfrac{x^n}{y^n}, y\ne0$
(ii) $(xy)^m=x^my^m$
Use the rules above to have:
$=\dfrac{8^6}{(n^5)^6}
\\=\dfrac{262,144}{n^{5(6)}}
\\=\dfrac{262,144}{n^{30}}$