#### Answer

Subtract

#### Work Step by Step

RECALL:
Order of operations follows the PEMDAS rule.
First Priority: P - parentheses/grouping symbols
Second Priority: E - exponents
Third Priority: M/D - multiplication/division, whichever comes first from the left
Fourth Priority: A/S - addition/subtraction, whichever comes first from the left
There are grouping symbols in the given expression. Thus, the first operation to be performed is the one inside of the brackets, which is $\underline{\text{subtraction}}$.