\[\boxed{\ \mathbf{485.}}\]
\[1)\ 9 \cdot 9 \cdot 9 \cdot 9 \cdot 9 = 9^{5}\]
\[2)\ a \cdot a \cdot a \cdot a = a^{4}\]
\[3)\ 3m \cdot 3m \cdot 3m \cdot 3m \cdot 3m =\]
\[= (3m)^{5}\]
\[4)\ \]