51. Calculators are awesome by the way!
17
17 plus 9 plus 6 plus 16 is a single number whose value is 38. The average of one number is itself.
17
45
5m + 7 - 2m - 1 = 3m + 6
17 + 6 = 23
17 + 6 + m
-34
-17.
17 + 14 + 17 + 19 + 18 + 13 + 11 = 109
5 + 6 + 6 = 17