Answer:
4x² - 6x + 2
Explanation:
Adding the like terms, that is
x³(2 + 1 - 3) + x²(-4 + 6 + 2) + x(6 - 8 - 4) + (- 3 + 12 - 7)
= 0 + 4x² - 6x + 2
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