$\large\frac{^8C_0}{6}$ - $^8C_1$ + $^8C_2.6$ + $....$ + $^8C_8.6^7$ = ?

Question

$\begin{array}{1 1} 0 \\ 6^7 \\ 6^8 \\ \frac{5^8}{6} \end{array}$