(8a^-9)^-2/3 Can please show me how to get the answer to this problem?

Verified Answer :

illl subtract all of them together and get my answer

MissAi

\(8^{- \frac{2}{3} } a^{6}\)
\(\frac{1}{8} ^{ \frac{2}{3} } a^{6}\)
\(\frac{1}{4} a^{6}\)