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Verified answer
1. x² - 4x - 60 ÷ x + 3= x * x ÷ x - 4x - 60 + 3
= x - 4x - 57
= - 3x - 57
2. x² + 6x + 9 ÷ 3 - 10
= x² + 6x + 3 - 10
= x² + 6x - 7