What is the order of operations in math?

It is something you use in math to answer questions that have more than one operation and more than two parts of a problem(ex.2+7 you can't use the order of operations for,(5/8)6+7,you can use this though).The way to remember the order is PEMDAS(parenthesis,exponents,multiply,divide,add,subtract)But go left to right when you do multiply/divide and add/subtract