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OpenStudy (anonymous):
Simplify: Add or subtract 1. (-2x4 + 4x - 12) + ( 5x2 - 5x) 2. (3y2 - 9y) - (-5y2 + 7y - 7) 3. (4x2 + 6x + 3) + (3x2 - 3x - 2) + (-4x2 + 3x - 9) 4. (7x2 + 2x + 7) - (4x2 - 2x + 3) + (-5x2 + 6x + 7) Simplify: Multiply 5. 5ab(6a - 4b) 6. 9x3(3x2 - 1) 7. (5x + 3)(x + 6) 8. (4x + 3)(2x - 4) 9. ( x - 7)(x + 6) 10. (3a - 7b)2
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