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Answer:
x^3 + 3x^2 - 16x - 48.
Step-by-step explanation:
(x - 4)(x + 3)(x + 4)
= (x - 4)(x + 4)(x + 3)
= (x^2 - 16)(x + 3)
= x^3 + 3x^2 - 16x - 48.