What Is A monomial or the sum or difference of two or more monomials?

A monomial is a single term algebraic expression that consists of a coefficient and one or more variables raised to non-negative integer powers, such as (3x^2) or (-4y). The sum or difference of two or more monomials is called a polynomial, which can include terms like (2x^2 + 3x - 5) or (4y - 7y^2 + 2). Polynomials are characterized by having multiple terms, whereas monomials have only one term.