The calculation that comes first in the order of operations is Parentheses. Thus, option D is correct.
Parentheses also known as round brackets in mathematics is the operation in which the numbers are grouped in brackets and then solved first in an equation.
The order of operations in mathematics is called as PEMDAS. Thus, it follows from parentheses and then multiplication and division, addition and at last subtraction. The correct option is (D).
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