A monomial is a single term, there are no additions or subtractions. There can be multiplications but no divisions by variables.
Examples of monomials: 12, -7, 2/3, x, 4x3, 7x4yz2, -15x7/23, 0, πr3
These are not monomials: 2x + 7, 14x3/y, x2 - 3x + 4
