34:5+67-23

To solve the expression \(34:5 + 67 - 23\), we first need to clarify the operation indicated by the colon (:). If we interpret it as division, the expression can be rewritten as:

\[ \frac{34}{5} + 67 - 23 \]

Now, let's calculate:

1. Calculate \(\frac{34}{5}\): \[ \frac{34}{5} = 6.8 \]

2. Now, substitute this back into the expression: \[ 6.8 + 67 - 23 \]

3. Calculate \(6.8 + 67\): \[ 6.8 + 67 = 73.8 \]

4. Finally, subtract 23: \[ 73.8 - 23 = 50.8 \]

So, the final result is: \[ \boxed{50.8} \]