6a + 6 = 42, 13a - 9 = 56, 8a + 5 - 2 = 35, 2a + 4a = 34, 5(5a + 7) - 5 = 105, 6a + 7a + 1a = 55, 2a + 7 + 7 + 7 + 3a = 152, 6a + 9a + 6a = 792.

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