Algebraic identities part 5

In the given diagram identify parts 1-5

Algebraic Expressions and Polynomials

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

Prove that "The Algebraic Sum of deviations from Mean is zero".

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. (2)/(3)x^(2)-(5)/(7)x-(1)/(4)

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)

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

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