Срочно! Всё баллы даю!!!

Ответ:

$3$ x $2\frac{7}{15} - 5\frac{1}{2}$ x $\frac{7}{9} + 1\frac{7}{48}$ x $2\frac{2}{11} - \frac{2}{5}$ x $6\frac{5}{9}$ = 3 x $\frac{37}{15} - \frac{11}{2}$ x $\frac{7}{9} + \frac{56}{48}$ x $\frac{24}{11} - \frac{2}{5}$ x $\frac{59}{9}$ = $\frac{37}{5} -\frac{77}{18} +\frac{56}{22} -\frac{118}{45}$ = $\frac{666-385}{90} + \frac{56}{22} -\frac{118}{45}$ = $\frac{3091+2520}{990} -\frac{118}{45}$ = $\frac{5611-2596}{990}$ = $\frac{3015}{990}$ = $\frac{67}{22}$ = $3\frac{1}{22}$