Answer
$$x^3-12x^2+48x-64$$
Work Step by Step
We simplify for this problem by multiplying out the factors. Doing this, we obtain:
$$ \left(x-4\right)^3\\ x^3-3x^2\cdot \:4+3x\cdot \:4^2-4^3\\ x^3-12x^2+48x-64$$
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