The polynomial is .

To find the degree of polynomial, you must find the degree of each term or monomial.

The degree of a monomial is the sum of the exponents of all its variables.

The monomial is , so its degree .

The monomial is a nonzero constant, so its degree .

The monomial is , so its degree .

The degree of a polynomial is the greatest degree of any term in the polynomial.

In the above polynomial greatest degree is 7, so its degree is 7.

The degree of a polynomial is 7.