\[\boxed{\mathbf{2.}\mathbf{413}}\]
\[\textbf{а)}\ \frac{27}{35} \cdot \frac{7}{9} - \frac{9}{24} \cdot \frac{6}{45} = \frac{3^{\backslash 4}}{5} - \frac{1}{20} =\]
\[= \frac{12}{20} - \frac{1}{20} = \frac{11}{20}\]
\[\textbf{б)}\ 1\frac{41}{44} \cdot \frac{11}{17} - \frac{27}{40} \cdot \frac{5}{18} =\]
\[= \frac{85 \cdot 11}{44 \cdot 17} - \frac{27 \cdot 5}{40 \cdot 18} = \frac{5}{4} - \frac{3}{8 \cdot 2} =\]
\[= 1\frac{1^{\backslash 4}}{4} - \frac{3}{16} =\]
\[= 1\frac{4}{16} - \frac{3}{16} = 1\frac{1}{16}\]
\[\textbf{в)}\ 12\frac{1}{10} \cdot 2\frac{4}{11} + 2\frac{24}{31} \cdot 7\frac{3}{4} =\]
\[= \frac{121 \cdot 26}{10 \cdot 11} + \frac{86 \cdot 31}{31 \cdot 4} =\]
\[= \frac{11 \cdot 26}{10} + \frac{43}{2} =\]
\[= 28,6 + 21,5 = 50,1\]
\[\textbf{г)}\ 13\frac{2}{7} - 5\frac{5}{8} \cdot \left( 1\frac{2^{\backslash 5}}{9} - \frac{39}{45} \right) =\]
\[= 13\frac{2}{7} - \frac{45}{8} \cdot \left( \frac{55}{45} - \frac{39}{45} \right) =\]
\[= 13\frac{2}{7} - \frac{45 \cdot 16}{8 \cdot 45} =\]
\[= 13\frac{2}{7} - 2 = 11\frac{2}{7}\]
\[\textbf{д)}\ \left( \frac{3}{5} \right)^{3} = \frac{27}{125}\]
\[\textbf{е)}\ \left( \frac{7}{8} \right)^{2} = \frac{49}{64}\]