Ответ:

  1. \(\left(\frac{3}{5}\right)^4\cdot\frac{5^3}{3^2}=\frac{3^4}{5^4}\cdot\frac{5^3}{3^2}=\frac{3^{4-2}}{5^{4-3}}=\frac{9}{5}\).

  2. \(\frac{7^5}{5^7}\cdot\left(\frac{5}{7}\right)^6=\frac{7^5}{5^7}\cdot\frac{5^6}{7^6}=\frac{1}{35}\).

  3. \(\left(\frac{2}{3}\right)^3\cdot\left(\frac{3}{2}\right)^5=\left(\frac{3}{2}\right)^{5-3}=\left(\frac{3}{2}\right)^2=\frac{9}{4}\).

  4. \(\left(\frac{3}{4}\right)^6\cdot\left(\frac{4}{3}\right)^8=\left(\frac{4}{3}\right)^{8-6}=\left(\frac{4}{3}\right)^2=\frac{16}{9}\).

Ответ: 1) \(\frac{9}{5}\); 2) \(\frac{1}{35}\); 3) \(\frac{9}{4}\); 4) \(\frac{16}{9}\).