3+x-2x^2 divided by x+1
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3+x-2x² ÷ x + 1
3-3+x-2x² ÷ x + 1-3
3-2x²÷x-2
3-3-2x²÷x-2-3
2x²÷x-5
2x²/2÷x-5/2
x²÷x-2.5
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