To simplify the expression \( a^{67}b^{34} \), we recognize that it is already in its simplest form because both terms are expressed using their respective exponents.
If you're looking for an option among those provided:
- \( 23 \)
- \( 23 a^{33} \)
- \( ab^{33} \)
- \( a^{67}b^{34} \)
- \( \frac{a^{67}}{b^{34}} \)
The correct still simplified expression that corresponds to the original expression is:
\( a^{67}b^{34} \)
This option must be correctly interpreted as it maintains the original expression without unnecessary transformations. None of the other options provide the correct form or simplification.