What are all the parts of an algebraic expression and can you define them?

Variables - a quantity that may change, depends on the context of the math problem. Ex: x, y

Terms - a variable, or constant, that is multiplied by a variable or variables.

Ex: 5x + 2 + 3y < - - has 3 terms

Coefficient - the constant that multiplies the variable and is next to a variable, Ex: (5x) < - - coefficient is 5

Constants - A fixed value such as 5, 6, 7, etc