A numerical recipe for computing something; the mathematical equivalent of a vending machine.
An expression is to an equation what a phrase is to a sentence—a math expression behaves like an equation without the equal sign.
by MathPlus September 20, 2016
Usually how someones face looks that describes how they feel emotionally.
There's many expressions, if someone's angry, their eyebrows may be lowered, and their face tense.
by moomobile7 July 16, 2016