Найдите сумму: 9 8/21+4 11/14.

\[9\frac{8^{\backslash 2}}{21} + 4\frac{11^{\backslash 3}}{14} = 13\frac{16 + 33}{42} =\]

\[= 13\frac{49}{42} = 14\frac{7}{42} = 14\frac{1}{6}\]