\[14 - 6x\]
\[при\ x = 3:\ \ \]
\[14 - 6 \cdot 3 = 14 - 18 = - 4.\]
\[при\ x = - 4:\]
\[14 - 6 \cdot ( - 4) = 14 + 24 = 38.\]
\[при\ x = 0:\ \]
\[14 - 6 \cdot 0 = 14.\]
\[при\ x = \frac{5}{6}:\ \ \]
\[14 - \frac{6 \cdot 5}{6} = 14 - 5 = 9.\]