First, we need to follow the order of operations (parentheses, exponents, multiplication and division- left to right, addition and subtraction- left to right):
(35+7):68+49:(16-9)9(42):68+49:(7)978+49:7956 + 49:7956 + 7956 + 63119
Therefore, (35+7):68+49:(16-9)9 = 119.
First, we need to follow the order of operations (parentheses, exponents, multiplication and division- left to right, addition and subtraction- left to right):
(35+7):68+49:(16-9)9
(42):68+49:(7)9
78+49:79
56 + 49:79
56 + 79
56 + 63
119
Therefore, (35+7):68+49:(16-9)9 = 119.