Expressions. In programming—and computer science in general—an expression is something which can be evaluated—that is, a syntactically valid combination of constants, variables, functions, and ...

PEMDAS is an acronym for the order of operations to solve an equation. Anything inside parenthesis (P) should be worked out first. Secondly, exponents (E) should be addressed.

Teachers should steer students away from the popular "Dear Aunt Sally" (PEMDAS) order of operations acronym, says math coach David Ginsburg.