Решите пожалуйста :'(:'(:'(:'(:'(:'(:'(:'(

Решите задачу:

$1) \: \: \frac{4}{15} + \frac{3}{4} = \frac{16 + 45}{60} = \frac{61}{60} = 1 \frac{1}{60} \\ \\ 2) \: \: \frac{5}{6} - \frac{9}{14} = \frac{35 - 27}{42} = \frac{8}{42} = \frac{4}{21}$
$3) \: \: 4 \frac{4}{7} + 6 \frac{1}{4} = 4 \frac{16}{28} + 6 \frac{7}{28} = 10 \frac{23}{28} \\ \\ 4) \: \: 5 \frac{7}{8} - 3 \frac{5}{6} = 5 \frac{21}{24} - 3 \frac{20}{24} = 2 \frac{1}{24}$