Answer
$$[12 - (13 - 17)] - [9 - (6 - 10)] = 3$$
Work Step by Step
Simplify: $$[12 - (13 - 17)] - [9 - (6 - 10)]$$
Perform the operations inside the parentheses:
$$[12 - (13 - 17)] - [9 - (6 - 10)]$$ $$[12-(-4)] - [9-(-4)]$$ $$[12+4] - [9+4]$$ $$16 - 13$$ $$3$$