\[\boxed{\text{5.\ 63}}\]
\[\textbf{а)}\ 9 \cdot (4y - 2) + 5 \cdot (2y - 4) =\]
\[= 36y - 18 + 10y - 20 =\]
\[= 46y - 38\]
\[\textbf{б)} - 3 \cdot (5a + 7) - 4 \cdot (3a - 1) =\]
\[= - 15a - 21 - 12a + 4 =\]
\[= - 27a - 17\]
\[\textbf{в)} - 7 \cdot (4 - 4y) + 5 \cdot (4 - 8y) =\]
\[= - 28 + 28y + 20 - 40y =\]
\[= - 12y - 8\]
\[\textbf{г)}\ (4x - 13) \cdot 3 - 4 \cdot (5 - 6x) =\]
\[= 12x - 39 - 20 + 24x =\]
\[= 36x - 59\]
\[\textbf{д)}\ (5c - 1) \cdot ( - 4) + (3c - 9) \cdot ( - 3) =\]
\[= - 20c + 4 - 9c + 27 =\]
\[= - 29c + 31\]
\[\textbf{е)} - 1,5 \cdot ( - 4b + 8) - (10 + b) =\]
\[= 6b - 12 - 10 - b = 5b - 22\ \]
\[\textbf{ж)} - 8 \cdot \left( \frac{1}{4}a - \frac{1}{8} \right) + 6 \cdot \left( \frac{1}{3}a - \frac{1}{16} \right) =\]
\[= - 2a + 1 + 2a - \frac{6}{16} = 1 - \frac{3}{8} =\]
\[= \frac{5}{8}\]
\[\textbf{з)}\ 7 \cdot \left( \frac{5}{7}x - 1,8 \right) - 4 \cdot \left( \frac{3}{4}x - 1,3 \right) =\]
\[= 5x - 12,6 - 3x + 5,2 =\]
\[= 2x - 7,4\]