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Simplifying Expressions 3

AB
7r + 2r - 49r - 4
23x - 7x + 4x20x
3xy + 13 xy - 12 xy4xy
-3n + 12 - 4n-7n + 12
12ax - 2ax + 14x - 2a + -3x10ax + 11x - 2a
3x + 2y + xy - 6xy + 4x + -4y7x - 2y - 5xy
2r + 4ry - 5r + 3x - 4ry-3r + 3x
12p + 5pd - 3p + 6pd9p + 11pd
4x - 2x + 6xy + 21x + -9xy - 923x + -3xy -9
4e + 5ed + 4d - 7ed + 74e + 4d - 2ed + 7
3x + 2y - 2xy + 5x -2xy8x - 4xy + 2y
7a + a -a + 3ab - ab + 2ab7a + 4ab
5m + 2m + 40m + m + 1748m + 17
2x + 3xy + 4x + 5xy + 6x12x + 8xy