In Algebra, Math expressions are the combination of variables, operators (signs) and constants.

Example: $a + 7$

In any math expression,  a variable can change its value any time, but in case of constants the value remains the same.

## What are Math Expressions?

An algebraic expression is a number, a variable or a combination of the two factors connected by mathematical operations like addition, subtraction, multiplication, and division.

For example : $4x, 3p, 2a+b,$$\frac{6z}{5}$