4 целых 1/3 : ( 5/6 + 0,25 ) знак дроби ( 7/12 - 2/15 ) : 0,9 - 3,6 * ( 7/12 + 1/9) знак...

Решите задачу:

$\displaystyle \frac{4 \frac{1}{3}:( \frac{5}{6}+0,25)}{( \frac{7}{12}- \frac{2}{15}):0,9}- \frac{3,6*( \frac{7}{12}+ \frac{1}{9})}{( \frac{5}{8}- \frac{1}{3})*1 \frac{5}{7}}=\\= \frac{ \frac{13}{3}:( \frac{5}{6}+ \frac{1}{4})}{( \frac{35-8}{60}): \frac{9}{10}}- \frac{ \frac{18}{5}*( \frac{21+4}{36})}{( \frac{15-8}{24})* \frac{12}{7}}=\\= \frac{ \frac{13}{3}: \frac{13}{12}}{ \frac{27}{60}* \frac{10}{9}}- \frac{ \frac{18}{5}* \frac{25}{36}}{ \frac{7}{24}* \frac{8}{7}}=$
$\displaystyle = \frac{ \frac{13}{3}* \frac{12}{13}}{ \frac{3}{6}}- \frac{ \frac{5}{2}}{ \frac{1}{3}}=4: \frac{3}{6}- \frac{5}{2}: \frac{1}{3}= \frac{4*6}{3}- \frac{15}{2}=\\= \frac{8}{1}- \frac{15}{2}= \frac{16-15}{2}= \frac{1}{2}$