Помогите с примерами пожалуйста

Решите задачу:

$\frac{3}{54} + \frac{2}{27} \times 2 = \frac{3}{54} + \frac{4}{54} = \frac{7}{54}$
$\frac{5}{45} \times 2 + \frac{3}{90} = \frac{10}{90} + \frac{3}{90} = \frac{13}{90}$
$\frac{8}{81} \times 8 - \frac{5}{72} \times 9 = \frac{64}{648} - \frac{45}{648} = \frac{19}{648}$
$\frac{7}{8} \times 9 - \frac{4}{9} \times 8 = \frac{63}{72} - \frac{32}{72} = \frac{31}{72}$
$\frac{3}{60} - \frac{2}{15} \times 4 = \frac{3}{60} - \frac{8}{60} = - \frac{5}{60} = - \frac{1}{12}$
$\frac{3}{49} \times 6 + \frac{5}{42} \times 7 = \frac{18}{294} + \frac{35}{294} = \frac{53}{294}$
$\frac{3}{115} \times 2 + \frac{5}{46} \times 5 = \frac{6}{230} + \frac{25}{230} = \frac{31}{230}$
$\frac{7}{25} \times 7 - \frac{3}{35} \times 5 = \frac{49}{175} - \frac{15}{175} = \frac{34}{175}$