When simplifying mathematical expressions perform the operations in the following order: Simplify all expressions inside the parentheses or other grouping symbols, working on the innermost parentheses...When simplifying mathematical expressions perform the operations in the following order: Simplify all expressions inside the parentheses or other grouping symbols, working on the innermost parentheses first. Simplify all expressions with exponents. Perform all multiplication and division in order from left to right. Perform all addition and subtraction in order from left to right. Multiplication and division, and addition and subtraction have equal priority.