Номер 732 20 балловСрочно пажалуйста!!!

Решите задачу:

$25 \frac{5}{6} + (11 \frac{1}{6} - 9 \frac{5}{6} ) = 25 \frac{5}{6} + 1 \frac{2}{6} = 27 \frac{1}{6} \\ \\ (25 \frac{11}{19} + 9 \frac{8}{19} ) - 20 \frac{8}{19} = 35 - 20 \frac{8}{19} = 34 \frac{19}{19} - 20 \frac{8}{19} = 14 \frac{11}{19} \\ \\ 28 \frac{7}{20} - (9 \frac{11}{20} + 5 \frac{7}{20} ) = 28 \frac{7}{20} - 14 \frac{18}{20} = 13 \frac{9}{20} \\ 49 \frac{19}{40} + (25 \frac{21}{40} + 6 \frac{13}{40} ) = 49 \frac{19}{40} + 31 \frac{34}{40} = 80 \frac{53}{40} = 81 \frac{13}{40}$