4) а)
\[ -17^{-34} = -\frac{1}{17^{34}} \]
4) г)
\[ 6^{-2} + 24^{-1} = \frac{1}{6^2} + \frac{1}{24} = \frac{1}{36} + \frac{1}{24} = \frac{2}{72} + \frac{3}{72} = \frac{5}{72} \]