(-1,2-1,2):(-1-2)

It looks like you're trying to perform some mathematical operations. To clarify your expression, are you looking for a simplification or a calculation involving vectors or coordinates?

If we interpret your notation as follows:

\[ (-1, 2 - 1, 2) : (-1 - 2) \]

This can be broken down:

1. The first part seems to represent coordinate points or a vector: (-1, 1, 2), since \(2 - 1 = 1\).
2. The second part seems to represent a scalar: (-3), since \(-1 - 2 = -3\).

If you can clarify what operation (e.g., vector division, scalar multiplication) you intend to perform with these values, I can be of better assistance!