-3 + 6×2 = -3 + 12 = 9
2×(-2)^2 - 4 (3×(-2)+7) = 2×(-2)^2 -4×1 = 2×(-4) -4x1 = (-8) - (-4) = (-4)
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-3 + 6×2 = -3 + 12 = 9
2×(-2)^2 - 4 (3×(-2)+7) = 2×(-2)^2 -4×1 = 2×(-4) -4x1 = (-8) - (-4) = (-4)