(\frac{2}{3})^3:(\frac{4}{9})^3*2^3=(\frac{2}{3}:\frac{4}{9})^3*2^3=(\frac{2}{3}*\frac{9}{4})^3*2^3=(\frac{3}{2}*2)^3=3^3
(\frac{3}{5})^2:(\frac{7}{10})^2*14^2=(\frac{3}{5}:\frac{7}{10})^2*14^2=(\frac{3}{5}*\frac{10}{7})^2*14^2=(\frac{6}{7}*14)^2=12^2