Answer :

The power of a power rule:

[tex](x^n)^m=x^{n\cdot m}[/tex]

The powers multiply each other.

Simplify:

[tex]\begin{gathered} (u^3)^4=u^{3\cdot4}=u^{12} \\ \text{Answer:} \\ u^{12} \end{gathered}[/tex]

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