-2145:(-1,7)

I’m not sure what you want to do with "-2145:(-1,7)". Here are a couple of common interpretations. Tell me which one matches your problem, or share the exact task.

• If you mean scalar multiplication of a vector: -2145 * (-1, 7) = (2145, -15015).
• If you meant something like a ratio involving the vector (-1, 7), please specify the exact operation (e.g., express -2145 as a combination of -1 and 7, or form a ratio with components).

If you can provide the context or the full problem statement, I can give a precise solution.