Grouping / Order of Operations

      When expressions have more than one operation, we have to follow rules for the order of operations:

            1.  First do all operations that lie inside parentheses.

            2.  Next, do any work with exponents or radicals.

            3.  Working from left to right, do all multiplication and division.

            4.  Finally, working from left to right, do all addition and subtraction.

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