Simplify.5x + 12x(6x2 - 6x - 9) + (-7x + 1)
A. 72x3 - 110x + 1
B. 72x3 - 72x2 - 110x + 1
C. 72x3 - 72x2 + x + 1
D. 72x3 - 72x2 - 110x
Answer: B
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