\[\boxed{\mathbf{1100\ (1091)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1) - 12 \cdot\]
\[\cdot \left( \frac{5}{6}a - \frac{1}{4}b + \frac{7}{24}c - \frac{1}{12} \right) =\]
\[= - 10a + 3b - 3,5c + 1\]
\[2)\ \left( 16a + 8b - \frac{5}{9}c - \frac{4}{9}d \right) \cdot\]
\[\cdot \left( - \frac{9}{32}n \right) = - 4,5an -\]
\[- 2,25bn + \frac{5}{32}cn + \frac{1}{8}\text{dn}\]
\[3) - \frac{4}{15}bc \cdot\]
\[\cdot \left( - 45a - 30d + 3\frac{3}{4}m - \frac{3}{8} \right) =\]
\[= 12abc + 8bcd - bcm + \frac{1}{10}\]
\[4)\ ( - 3,6ab + 20a - b - 100) \cdot\]
\[\cdot ( - 5xy) = 18abxy - 100axy +\]
\[+ 5bxy + 500xy\]