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2(x - 1)(y + 2) - (x + 2xy - 4y + 5) = 2(xy + 2x - y - 2) - (x + 2xy - 4y + 5) =
= 2xy + 4x - 2y - 4 - x - 2xy + 4y - 5 = 3x + 2y - 9