Ответ:

  1. \(\dfrac{(5^6)^4\cdot(5^2)^5}{5^{35}}=5^{24+10-35}=5^{-1}=\dfrac15\).
  2. \(\dfrac{(3^9)^4}{3^{19}\cdot3^{15}}=3^{36-19-15}=3^2=9\).
  3. \(\dfrac{(2^8)^3\cdot16}{(2^3)^9\cdot2}=2^{24+4-27-1}=2^0=1\).