The integral of \( x^n \) is \( \frac{x^{n+1}}{n+1} \), so:
\[
\int 34x^4 dx = \frac{34x^5}{5} + C
\]
Thus, the correct answer is \( \frac{34x^5}{5} + C \), but there was an error in the transcription above, we need to correctly update the integral form.