2.1

5: g is the same as g¹.

8: -4/9 is a constant since there is no variable.

14: -w¹² is the same as -1w¹².

28: Combine like terms.

33: When subtracting the negative terms, it will be the same as adding positive terms.

47: A polynomial is the sum of one or more monomials.

49: A binomial is a polynomial with two terms.

55: Combine like terms.

61: Multiply 8x – 10 by 4x to get the total area, and then find the area of the pool and hot tub and subtract these.

63: Distribute the 8 to both of the terms in the parentheses, and the same for the 2.