Can you give me the anwsers fast pls

Which expression is equivalent to (9x - 3 1/ + 1 3/8)

Proceed as in example 3 in section 6.1 to rewrite the given expression using a single power series whose general term involves xk. ∞ n(n − 1)cnxn − 2 n = 2 − 4 ∞ ncnxn n = 1 + ∞ cnxn n = 0

Which expression is equivalent to the expression shown?