I came up with a new problem: Are each of these equations possible with only adding mathematical symbols? If so, what's the solution?

7 7 7 = 0
7 7 7 = 1
7 7 7 = 2
7 7 7 = 3
7 7 7 = 4
7 7 7 = 5
7 7 7 = 6
7 7 7 = 7
7 7 7 = 8
7 7 7 = 9
7 7 7 = 10