8) \(4^{\frac{5}{6}}:4^{\frac{1}{6}}\)

\[4^{\frac{5}{6}}:4^{\frac{1}{6}}=4^{\frac{5}{6}-\frac{1}{6}}=4^{\frac{4}{6}}=4^{\frac{2}{3}}\]

Ответ: \(4^{\frac{2}{3}}\)