1:3 × (6 ÷ 3 + 6)
2:3 × ((6 ÷ 3) + 6)
3:3 × (6 + 6 ÷ 3)
4:3 × (6 + (6 ÷ 3))
5:(6 ÷ 3 + 6) × 3
6:((6 ÷ 3) + 6) × 3
7:(6 + 6 ÷ 3) × 3
8:(6 + (6 ÷ 3)) × 3