Ответ:
\((6^4)^4:(6^5)^3=6^{16}:6^{15}=6\).
\(8^3:4^4=2^9:2^8=2\).
\(\dfrac{7^{14}\cdot(7^2)^3}{(7^3)^6\cdot7^2}=\dfrac{7^{14+6}}{7^{18+2}}=1\).
\(\dfrac{25^3\cdot125^2}{5^{10}}=\dfrac{5^6\cdot5^6}{5^{10}}=5^2=25\).
\(\dfrac{3^8\cdot7^8}{21^7}=\dfrac{21^8}{21^7}=21\).
\(\dfrac{5^9\cdot4^6}{20^6}=\dfrac{5^9\cdot2^{12}}{5^6\cdot2^{12}}=5^3=125\).
Ответ: 1) 6; 2) 2; 3) 1; 4) 25; 5) 21; 6) 125.
