98-72:9(35+55):3

To solve the expression \( 98 - 72:9(35 + 55):3 \), we need to follow the order of operations (PEMDAS/BODMAS):

1. Parentheses/Brackets
2. Exponents/Orders
3. Multiplication and Division (from left to right)
4. Addition and Subtraction (from left to right)

Let's break it down step by step:

1. Calculate the expression inside the parentheses: \[ 35 + 55 = 90 \]

2. Now we can rewrite the expression: \[ 98 - 72:9 \cdot 90:3 \]

3. Next, simplify the divisions: \[ 72:9 = 8 \] and \[ 90:3 = 30 \]

4. Now rewrite the expression again: \[ 98 - 8 \cdot 30 \]

5. Next, perform the multiplication: \[ 8 \cdot 30 = 240 \]

6. Now we can rewrite it again: \[ 98 - 240 \]

7. Finally, perform the subtraction: \[ 98 - 240 = -142 \]

So, the final result of the expression \( 98 - 72:9(35 + 55):3 \) is \( -142 \).