Ответ:

  1. (5^(1/4) · 5^(−1/4))/5² = 5⁰/5² = 1/25.
  2. (7^(2/3) · 7^(−4/3))/7² = 7^(−2/3)/7² = 7^(−8/3) = 1/(7²·∛49).
  3. ((0,3)^0,3 · (0,3)⁻¹)/(0,3)^1,3 = (0,3)^(0,3−1−1,3) = (0,3)^−2 = 100/9.