Ответ:

  1. \(1.3^4\cdot0.65^4\cdot2.5^4=(1.3\cdot0.65\cdot2.5)^4=(2.1775)^4=(\frac{871}{400})^4\).
  2. \((5^2)^5\cdot12^{10}:(-30)^{10}=5^{10}\cdot12^{10}:30^{10}=(\frac{5\cdot12}{30})^{10}=2^{10}=1024\).
  3. \((-\frac{3}{5})^6:(-\frac{2}{5})^6\cdot(-\frac{2}{3})^6=(( -\frac{3}{5}):( -\frac{2}{5})\cdot(-\frac{2}{3}))^6=1^6=1\).

Ответ: \((\frac{871}{400})^4\); 1024; 1.