(657+123):3-124

To solve the expression \( (657 + 123) : 3 - 124 \), follow these steps:

1. First, perform the addition inside the parentheses: \[ 657 + 123 = 780 \]

2. Now, divide the result by 3: \[ 780 : 3 = 260 \]

3. Finally, subtract 124 from the result: \[ 260 - 124 = 136 \]

So, the final answer is \( 136 \).