Final answer to the problem
$x^{20}$
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Step-by-step Solution
Specify the solving method
1
Simplify $\left(x^4\right)^5$ using the power of a power property: $\left(a^m\right)^n=a^{m\cdot n}$. In the expression, $m$ equals $4$ and $n$ equals $5$
$x^{4\cdot 5}$
2
Multiply $4$ times $5$
$x^{20}$
Final answer to the problem
$x^{20}$