Вариант 2. 2. Выполните действия: (−7/18 + 11/12) : (−19/48); (10/21 − 25/28) : (−11/14 + 14/35).

1. \(\left(-\frac7{18}+\frac{11}{12}\right):\left(-\frac{19}{48}\right)=\left(-\frac{14}{36}+\frac{33}{36}\right)\cdot\left(-\frac{48}{19}\right)=\frac{19}{36}\cdot\left(-\frac{48}{19}\right)=-\frac43\).
2. \(\left(\frac{10}{21}-\frac{25}{28}\right):\left(-\frac{11}{14}+\frac{14}{35}\right)=\left(\frac{40}{84}-\frac{75}{84}\right):\left(-\frac{55}{70}+\frac{28}{70}\right)=\left(-\frac5{12}\right):\left(-\frac{27}{70}\right)=\frac{175}{162}\).

Ответ: −4/3; 175/162.