The sum of two or more monomials can occur only if the monomials are like terms.
In this case the resulting monomial has coefficient as the sum of the coefficients of monomials addends and as literal part, the same literal part.
Example:
The next monomials are unlike terms: 3xy - 2a will remain unchanged (in the following paragraphs we will give you the name of polynomial .

Product

The product of two or more monomials is a monomial has coefficient for the product of all the coefficients and as a literal part all literal factors, each with an exponent equal to the sum of the exponents that it has in the individual monomials. Example

Division

The quotient of two monomials is a monomial only if the literal part of the dividend is a multiple of the divisor. Examples:

Power

The power of a monomial is a monomial whose coefficient of the power coefficient and as a literal part the power of each literal monomial factor. Example