Выполни действия с дробями и возведи дроби в степень

a) $\frac{3}{4} \cdot \frac{5}{7} = \frac{3 \cdot 5}{4 \cdot 7} = \frac{15}{28}$ б) $\frac{1}{8} \cdot \frac{3}{4} = \frac{1 \cdot 3}{8 \cdot 4} = \frac{3}{32}$ в) $\frac{4}{7} \cdot \frac{5}{6} = \frac{4 \cdot 5}{7 \cdot 6} = \frac{20}{42} = \frac{10}{21}$ г) $\frac{2}{5} \cdot \frac{7}{11} = \frac{2 \cdot 7}{5 \cdot 11} = \frac{14}{55}$ д) $\frac{1}{2} \cdot \frac{4}{9} = \frac{1 \cdot 4}{2 \cdot 9} = \frac{4}{18} = \frac{2}{9}$ е) $\frac{11}{12} \cdot \frac{8}{9} = \frac{11 \cdot 8}{12 \cdot 9} = \frac{88}{108} = \frac{22}{27}$ ж) $\frac{2}{5} \cdot \frac{3}{2} = \frac{2 \cdot 3}{5 \cdot 2} = \frac{6}{10} = \frac{3}{5}$ з) $\frac{11}{15} \cdot \frac{3}{5} = \frac{11 \cdot 3}{15 \cdot 5} = \frac{33}{75} = \frac{11}{25}$ и) $\frac{15}{16} \cdot \frac{5}{9} = \frac{15 \cdot 5}{16 \cdot 9} = \frac{75}{144} = \frac{25}{48}$ к) $\frac{12}{25} \cdot \frac{9}{16} = \frac{12 \cdot 9}{25 \cdot 16} = \frac{108}{400} = \frac{27}{100}$ л) $\frac{14}{17} \cdot \frac{34}{63} = \frac{14 \cdot 34}{17 \cdot 63} = \frac{476}{1071} = \frac{68}{153}$ м) $\frac{17}{26} \cdot \frac{13}{18} = \frac{17 \cdot 13}{26 \cdot 18} = \frac{221}{468}$ н) $(\frac{4}{5})^2 = \frac{4^2}{5^2} = \frac{16}{25}$ о) $(\frac{2}{3})^3 = \frac{2^3}{3^3} = \frac{8}{27}$ п) $(\frac{1}{7})^2 = \frac{1^2}{7^2} = \frac{1}{49}$