7) (5 1/16 − 1 1/8) · (5/6 + 3/14)

\(5\frac{1}{16}-1\frac{1}{8}=\frac{81}{16}-\frac{18}{16}=\frac{63}{16}\).

\(\frac{5}{6}+\frac{3}{14}=\frac{35}{42}+\frac{9}{42}=\frac{22}{21}\).

\(\frac{63}{16}\cdot\frac{22}{21}=\frac{33}{8}\).

Ответ: \(\frac{33}{8}\).