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Directions: Find each sum or difference. Answers must be in standard form.11. (x-4x + 3)...

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Directions: Find each sum or difference. Answers must be in standard form.11. (x-4x + 3) + (3x-3x - 5)12. (8r^2 -12r + 4)-(3r+5r-1)13. (2m-3+ 7m)-(3-9m -2m)14. (7p + 3p)-(5p + 4)15. (3a-a + 3) + (4a-5)16. (5w-w+ 2u + 4) + (3w+1-4w)17. (2x +3y^2-2z^2) (x ? y ? z) + (4x ? 3y)18. (12+ 8k + 3k-4k) + (5k + 15-k + 2k)19. Find the sum of (2x - 6x-2) and (x + 4x).20. Subtract (-a - 5ab + 3b) from (3a- 2ab + 3b).

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