multiply (x^2-1)(2x+1)*(x-1)
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Answer:
(x²-1)(2x+1)(x-1)
=(2x³+x²-2x-1)(x-1)
=2x⁴-2x³+x³-x²-2x²+2x+1
=2x⁴-x³-3x²+2x+1
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