Answer: C
Explanation: You first convert the mixed numbers into improper fractions ( including the ones inside and outside of the parentheses) Then, subtract the fractions inside of the parentheses. Then whatever you got, add it to the fraction that was outside of the parentheses.
(7^5/6 - 5^1/3) + 1^1/9
^
(47/6 - 16/3) + 10/9
^
5/2 + 10/9
65/18 = 3^11/18