Respuesta :

3x + 2x^2 - x^4 - 6x^4 + 7x - 2x^2

(We switched all the signs in the second parentheses because of the minus in front)

3x - x^4 - 6x^4 + 7x
10x - 7x^4

Are you supposed to solve for x or just simplify?
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