\[2m^{6} + 8m^{3} =\]
\[= 2m^{3}\left( m^{(6 - 3)} + 4 \right) =\]
\[= 2m^{3}\left( m^{3} + 4 \right)\]
\[Проверка:\ \]
\[2m^{3}\left( m^{3} + 4 \right) = 2m^{3 + 3} + 8m^{3}\]
\[2m^{6} + 8m^{3} = 2m^{6} + 8m^{3}\]
\[\Longrightarrow верно.\]