x⁴ - 3x³ - 2x² + 3 - 2x⁴ - 7x² + 5x + 3
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Step-by-step explanation:
x⁴ - 3x³ - 2x² + 3 - 2x⁴ - 7x² + 5x + 3
x⁴ - 2x⁴ - 3x³ - 2x² - 7x² + 5x + 3 + 3
-x⁴ - 3x³ -9x² + 5x +6
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