Answer:
[tex]27 {m}^{6} {n}^{12} [/tex]
Step-by-step explanation:
3 is the power of whole expression.
so,
that can be expressed as
[tex] = {3}^{3} { ({m}^{2} })^{3} { ({n}^{4}) }^{3} \\ = 27 {m}^{6} {n}^{12} [/tex]