Given:
[tex]\frac{m^{12}}{\mleft(m^8\mright)^3}[/tex]To simplify:
Solving we get,
[tex]\begin{gathered} \frac{m^{12}}{(m^8)^3}=\frac{m^{12}}{m^{24}^{}} \\ =m^{12-24} \\ =m^{-12} \\ =\frac{1}{m^{12}} \end{gathered}[/tex]Hence, the answer is,
[tex]\frac{1}{m^{12}}[/tex]