1:(7 + 9) × 2 - 82:((7 + 9) × 2) - 83:(9 + 7) × 2 - 84:((9 + 7) × 2) - 85:(2 × (7 + 9)) - 86:2 × (7 + 9) - 87:(2 × (9 + 7)) - 88:2 × (9 + 7) - 8