**PEMDAS **is an acronym that stands for **Parentheses**, **Exponents**, **Multiplication** and **Division**, and **Addition** and **Subtraction**. **It is a rule that is used to determine the order in which mathematical operations should be performed in an expression.**

According to the PEMDAS rule, operations within parentheses should be done first. If there are multiple sets of parentheses in an expression, the innermost set should be done first.

Exponents (or powers) should be calculated next. For example, in the expression 2^3, the exponent 3 should be calculated before the rest of the expression.

Multiplication and division should be done next, from left to right. If there are multiple multiplication or division operations in an expression, they should be done in the order that they appear from left to right.

Finally, addition and subtraction should be done from left to right. If there are multiple addition and subtraction operations in an expression, they should be done in the order that they appear from left to right.

The PEMDAS rule is a useful tool for helping to solve complex mathematical expressions and ensure that operations are done in the correct order.

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