Ответ:

  1. \(\left(\frac{109}{48}+\frac{29}{12}\right):\frac{15}{4}-\frac{39}{4}:12=\frac{75}{16}\cdot\frac{4}{15}-\frac{13}{16}=\frac{5}{4}-\frac{13}{16}=\frac{7}{16}\).
  2. \(\left(8:\frac{48}{19}-\frac{28}{15}\cdot\frac{55}{49}\right):\left(\frac{37}{12}-\frac{61}{36}\right)=\left(\frac{19}{6}-\frac{44}{21}\right):\frac{25}{18}=\frac{15}{14}\cdot\frac{18}{25}=\frac{27}{35}\).

Ответ: 1) \(\frac{7}{16}\); 2) \(\frac{27}{35}\).