Simplifying Fractional Exponents of a Polynomial

Q.

Write the following polynomials in standard form:

$5x^3+3x^4+x^6-7x^2$

Q. If the given expression is a polynomial, find its degree.
$4y+7+\frac{x^{5/2}y}{x^{1/2}}+2x^2$

1. The expression is not a polynomial and hence does not have a degree.
2. 0
3. 2
4. 3

Q. What is the degree of the expression $\frac{5\cdot x^{\frac{2021}{2022}}}{x^{\frac{2021}{2022}}}?$

1. $0$
2. $1$
3. $2021$
4. $2022$

Q. Which of the following is/are true about the expression $4x^3+2x^{\frac{5}{2}}(x^{\frac{3}{2}}+3x^{\frac{1}{2}})+7?$

1. Not a polynomial
2. A polynomial
3. Degree is $4$
4. Degree is not defined

Q. What is the degree of the polynomial $2x+\frac{7x^{\frac{9}{2}}}{x^{\frac{3}{2}}}+5?$

1. $3$
2. $2$
3. $1$
4. $0$