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(7x^3 + 2x - 1) + (8x^2 - 6 + 2x - x^3)

Ans: 6x^3 + 8x^2 + 4x - 7

Your answer is correct. (7x^3 + 2x - 1) + (8x^2 - 6 + 2x - x^3) does equal: 6x^3 + 8x^2 + 4x - 7.

I hope this helps! :)

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