I need need help with this math problem. I need to know do I start from left to right with the parentheses or brackets first.

Question

(15-5)/[(12/2*2)-2]

Brackets first Work from the outside in.

When you wrote 12/2*2, it is not clear whether you mean 12/(2*2) or (12/2)*2.

If you meant 12/(2*2), then that = 3, and the answer is
10/(3-2) = 10/1 = 10

I doubled checked and is listed as this: (15-5)/[(12/2*2)-2]

My comment stands. What you wrote is ambiguous