(0!+0!+0!)! = 6

Moving up or right, what is the highest total you can make, using the mathematical signs along the way?

Put Any Mathematic signs:

2 2 2 = 6

3 3 3 = 6

4 4 4 = 6

5 5 5 = 6

6 6 6 = 6

7 7 7 = 6

8 8 8 = 6

9 9 9 = 6