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kaevras
[D] Parentheses.

Basic mathematics, my friend. Parentheses could also be refered to as brackets.

This differs between countries and educational backgrounds, but always remember the order of mathematical operations:

B rackets
I ndices
D ivision
M ultiplication
A ddition
S ubtraction
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Adding parenthesis around calculations indicates which calculations should be performed first before following the typical order of operations. Correct answer: DThe order of operations is the order in which all algebraic expressions should be simplified is the following: First should be calculated expressions with parentheses, then exponents (and Roots) means power , then multiplication & Division and at the end Addition & Subtraction.

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