a) \((a^{-5})^3 \cdot a^{14} = a^{-15} \cdot a^{14} = a^{-15+14} = a^{-1} = \frac{1}{a}\)
б) \(\frac{a^{-5} - a^{-6}}{a^{-4} - a^{-5}} = \frac{a^{-6}(a-1)}{a^{-5}(a-1)} = \frac{a^{-6}}{a^{-5}} = a^{-6-(-5)} = a^{-1} = \frac{1}{a}\)
Ответ: а) \(\frac{1}{a}\), б) \(\frac{1}{a}\)