The expression \( \frac{a^{67}}{b^{34}} \) cannot be simplified further without specific values for \( a \) and \( b \). However, you can represent it in different forms depending on your needs. For example, it can remain as it is, or you could write it as \( a^{67} \cdot b^{-34} \).
If you would like to do more manipulation, please provide additional context or constraints!