In the order of operations, parentheses and brackets are completed first, followed by exponents, multiplication and division (from left to right), and finally addition and subtraction (from left to right). This can be remembered using the mnemonic acronym PEMDAS: Parentheses, Exponents, Multiplication and Division (left to right), Addition and Subtraction (left to right).
In the order of operations, the operation that is completed first is parentheses.
