Simplify: x4 - 6 x3 + 2x - 7 + 7 x3 - x + 5 x2 + 2 - x4
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x⁴-6x³+2x-7+7x³-x+5x²+2-x⁴
= x⁴-x⁴ -6x³+7x³ +5x²+2x -7+2
= x³+5x²+2x-5
I hope this answer helps you.
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