г)
\(\frac{5}{7}\)k - \(\frac{2}{3}\) - \(\frac{3}{14}\)k - \(\frac{1}{3}\) = (\(\frac{5}{7}\) - \(\frac{3}{14}\))k + (-\(\frac{2}{3}\) - \(\frac{1}{3}\)) = (\(\frac{10}{14}\) - \(\frac{3}{14}\))k + (-\(\frac{3}{3}\)) = \(\frac{7}{14}\)k - 1 = \(\frac{1}{2}\)k - 1
Ответ: \(\frac{1}{2}\)k - 1