Evaluate the following arithmetic expressions:
`12xx9+2-125-:5`

Answer

To evaluate the arithmetic expression `12xx9+2-125-:5`, we will follow the order of operations, often remembered by the acronym BODMAS (Brackets, Orders, Division and Multiplication (from left to right), Addition and Subtraction (from left to right)).

### Step-by-Step Solution:

1. **Rewrite the expression**:
The expression is `12xx9+2-125-:5`. We can rewrite it using standard mathematical symbols:
\[ 12 \times 9 + 2 - 125 \div 5 \]

2. **Perform Division**:
According to BODMAS, we first perform the division:
\[ 125 \div 5 = 25 \]
Now, substitute this back into the expression:
\[ 12 \times 9 + 2 - 25 \]

3. **Perform Multiplication**:
Next, we perform the multiplication:
\[ 12 \times 9 = 108 \]
Substitute this back into the expression:
\[ 108 + 2 - 25 \]

4. **Perform Addition**:
Now, we add:
\[ 108 + 2 = 110 \]
Substitute this back into the expression:
\[ 110 - 25 \]

5. **Perform Subtraction**:
Finally, we perform the subtraction:
\[ 110 - 25 = 85 \]

### Final Result:
The value of the expression `12xx9+2-125-:5` is **85**.