3/4:(1/14 - 5/7) + (5/6 - 7/12) *6 2/3 По действиям

Решите задачу:

$1) \frac{1}{14} - \frac{5}{7}= \frac{1-10}{14} =- \frac{9}{14} \\ 2) \frac{3}{4}:(- \frac{9}{14} )= \frac{3}{4} *(- \frac{14}{9})=- \frac{7}{6} \\ 3) \frac{5}{6} - \frac{7}{12}= \frac{10-7}{12} = \frac{3}{12} = \frac{1}{4} \\ 4) \frac{1}{4} *6 \frac{2}{3} = \frac{1}{4} * \frac{20}{3} = \frac{5}{3} \\ 5)- \frac{7}{6} + \frac{5}{3} = \frac{-7+10}{6} = \frac{3}{6}= \frac{1}{2}$