Identify which of the following algebraic expressions are polynomials. If so, write their degrees.
`(2)/(3)x^(3)-(5)/(4)x-7`

Identify which of the following algebraic expressions are polynomials. If so, write their degrees. x-(2)/(x)+5

Identify which of the following algebraic expressions are polynomials. If so, write their degrees. (2)/(3)x^(2)-(5)/(7)x-(1)/(4)

Identify which of the following algebraic expressions are polynomials. If so, write their degrees. xy+(x)/(y)-7

Idenitfy which of the following algebraic expression are polynomials. If so, write their degrees. 2x-(3)/(x)

Identify which of the following algebraic expressions are polynomials. If so, write their degrees. 3x^(2)+(2)/(x)-3

Idenitfy which of the following algebraic expression are polynomials. If so, write their degrees. (2)/(5)x^(3)-7x^(2)-(1)/(2)x+3

Identify which of the following algebraic expressions are polynomials. If so, write their degrees. x^(2)+y^(2)-3xy+(5)/(z)

Identify which of the following algebraic expressions are polynomials. If so, write their degrees. 2-z^(3)+3xy+(1)/(2)x^(4)

Identify which of the following algebraic expressions are polynomials. If so, write their degrees. (2)/(5)-(3)/(7)x^(3)+5xy^(3)-(1)/(2)z^(5)

Identify which of the following algebraic expressions are polynomials. If so, write their degrees. x^(2)y-2xy+(2)/(3)x-1