Mathematics, 14.11.2020 01:00 Mary516

what is the coefficient of x when (7+8x)-3(2+6x+2x^2)+9(1+3x+4x^2+12x ^3)-9(7-x^2-8x^3+13x^4) is simplified?

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what is the coefficient of x when (7+8x)-3(2+6x+2x^2)+9(1+3x+4x^2+12x ^3)-9(7-x^2-8x^3+13x^4) is sim...

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