\[\boxed{\mathbf{761\ (761).}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\textbf{а)}\frac{11^{\backslash 2}}{30} + \frac{7^{\backslash 5}}{12} = \frac{22 + 35}{60} = \frac{57}{60} = \frac{19}{20}\]
\[\textbf{б)}\frac{1^{\backslash 2}}{27} + \frac{5^{\backslash 3}}{18} = \frac{2 + 15}{54} = \frac{17}{54}\]
\[\textbf{в)}\frac{1^{\backslash 5}}{6} + \frac{1^{\backslash 3}}{10} + \frac{1^{\backslash 2}}{15} = \frac{5 + 3 + 2}{30} = \frac{10}{30} = \frac{1}{3}\]
\[\textbf{г)}\frac{3^{\backslash 6}}{7} + \frac{1^{\backslash 7}}{6} + \frac{5^{\backslash 3}}{14} = \frac{18 + 7 + 15}{42} = \frac{40}{42} = \frac{20}{21}\]
\[\textbf{д)}\frac{5^{\backslash 3}}{12} + \frac{2^{\backslash 4}}{9} + \frac{1^{\backslash 2}}{18} = \frac{15 + 8 + 2}{36} = \frac{25}{36}\]
\[\textbf{е)}\frac{1^{\backslash 9}}{2} + \frac{1^{\backslash 6}}{3} + \frac{1^{\backslash 2}}{9} = \frac{9 + 6 + 2}{18} = \frac{17}{18}\]