The answer is 65. Simply add the numbers together like you would for two plus two. To check your work, a calculator is the best option.
17 + 14 + 17 + 19 + 18 + 13 + 11 = 109
11 + 14 + 16 + 17 = 58
17 + 11 = 28
17 + 11 + 25 - 12 = 41
3 + 11 + 11 + 11 + 12 + 13 + 15 + 15 + 16 + 17 + 19 = 143
17 + 11 + (25-12) = 17 + 11 + 25 - 12 = 41.
-6 + 17 = 11
17 + 11 = 28 + 25 = 53 - 12 = 41.
60
-3z+17+12z = 11 9z = -6 z = -2/3
Six
17