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