Identify if the expressions below are polynomials or not for each of them.

The polynomials can´t contain:
 
 -Variables in the exponents of the terms.
 -Variables in the denominator.
 - Negative exponents.
 -Fractionals exponents.
 -The variables cant be as radicals.
 
 Therefore:
 
 a) It is a polynomial (The variable is under a radical)
 b) It is not a polynomial.
 c) It is a polynomial.
 d) It is not a polynomial. (It has a variable in the denominator).
 e) It is a polynomial.
 f) It is not a polynomial.  (It has a variable in the denominator).

With a continuous thought process.