PEMDAS

PEMDAS is the standard abbreviation for the order of operations. It is usually stated as Please Excuse my Dear Aunt Sally or Sue. 
The P in PEMDAS means parenthesis or grouping symbols
The E in PEMDAS means exponents
THE M in PEMDAS means multiplication
The D in PEMDAs means division
The A in PEMDAS means addition
The S in PEDMAS means subtraction
Each letter is in order and simplified from left to right.