1:3 × (4 - 6 + 10)
2:3 × ((4 - 6) + 10)
3:3 × (4 - (6 - 10))
4:3 × (4 + 10 - 6)
5:3 × ((4 + 10) - 6)
6:3 × (4 + (10 - 6))