(7:7)-0-9

To evaluate the expression (7:7) - 0 - 9, we can break it down step-by-step:

1. Calculate the division: \(7:7 = 1\) (since 7 divided by 7 equals 1).
2. Now our expression looks like this: \(1 - 0 - 9\).
3. Subtract \(0\) from \(1\): \(1 - 0 = 1\).
4. Now subtract \(9\): \(1 - 9 = -8\).

So, the final result of the expression (7:7) - 0 - 9 is \(-8\).