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V. Simplify by combining like terms.
54. 4x + 4-(5x-6)
55. -(x - 5)- 5 - x
56. -(a - b) -2(b-a)
57. 3a + 5b - 5a + 6b
58. 4x + 5y - 8+ 9x -lly+13
59. 2+2 + [3rt - (-5142 - 8rt?)]​