Ответ:

а) \(\left(\frac{x}{2y}\right)^5=\frac{x^5}{32y^5}\).

б) \(\left(\frac{3a^3}{4b^4}\right)^3=\frac{27a^9}{64b^{12}}\).

в) \(\left(-\frac{8a^4x}{5y^2b^6}\right)^2=\frac{64a^8x^2}{25y^4b^{12}}\).

Ответ: а) \(\frac{x^5}{32y^5}\); б) \(\frac{27a^9}{64b^{12}}\); в) \(\frac{64a^8x^2}{25y^4b^{12}}\).