4 * (2x + 3) - 8x + 12, 5 * (2x - 8) - 10x - 40, 10 * (3x + 5) - 30x + 50, 9 * (2x + 3y - 4) - 18x + 27y - 36, 10 * (2x + 3) - 20x + 30,

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