\[\boxed{\text{5.\ 58}}\]
\[\textbf{а)}\ (c - m + n) \cdot x =\]
\[= cx - mx + nx\]
\[\textbf{б)} - a \cdot (4c - d) = - 4ac + ad\]
\[\textbf{в)} - x \cdot (7y + 4n - 12) =\]
\[= - 7xy - 4xn + 12x\]
\[\textbf{г)}\ (2,5z + 4,5c + 8) \cdot 8x =\]
\[= 20zx + 36cx + 64x\]
\[\textbf{д)} - 4a \cdot (a + 3,5m - 9,5n) =\]
\[= - 4a^{2} - 14am + 38an\]
\[\textbf{е)}\ (4x - 3y + 2) \cdot ( - 5z) =\]
\[= - 20xz + 15yz - 10z\ \]