1:(2 - 6 + 7) × 82:((2 - 6) + 7) × 83:(2 - (6 - 7)) × 84:(2 + 7 - 6) × 85:((2 + 7) - 6) × 86:(2 + (7 - 6)) × 87:(2 × (7 + 8)) - 68:2 × (7 + 8) - 69:(2 × (8 + 7)) - 610:2 × (8 + 7) - 611:(7 +...