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2x²-2 +3x + 6 = 2x² + 4 + 3x
4(2x+4)-2(x-3)= ?
8 + 16 - 2x + 6 = 24- 2x
6(x-7)-5(4-x)= ?
6x - 42 - 20 + 5x = 5x - 62 + 5x