[tex] 2)\frac{2}{5}(\frac{3}{4}+\frac{5}{8})= \frac{2}{5}(\frac{2\cdot3+5}{8})= \frac{11}{20} \\ \\3) \frac{4}{7}(\frac{3\cdot2}{4}+\frac{21}{4})= \frac{27}{7} \\ \\13) (\frac{3}{2})^{2} = \frac{9}{4} \\ \\14) \frac{3}{4}^{3} =\frac{3^{3}}{ 4^{3}}= \frac{27}{64} [/tex]
