3(2x-5)-7(4-3x), 23c+5, 27x-13, -43+6, x+3, 8a-20=3a, 19, 57, 4, 7, 4x-7=13, 78, 2, 10, 5, 2x-4y+7-3x+2y, -1x-2+1, +3y-1y, 5-34, 6x.

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