$(\dfrac{-5}{24}+\dfrac{3}{4}-\dfrac{7}{12}):\dfrac{-5}{16}$
$=(\dfrac{-5}{24}:\dfrac{-5}{16})+(\dfrac{3}{4}:\dfrac{-5}{16})-(\dfrac{7}{12}:\dfrac{-5}{16})$
$=(\dfrac{-5}{24}\cdot\dfrac{-16}{5})+(\dfrac{3}{4}\cdot\dfrac{-16}{5})-(\dfrac{7}{12}\cdot\dfrac{-16}{5})$
$=\dfrac{2}{3}+\dfrac{-12}{5}+\dfrac{-28}{15}$
$=\dfrac{10}{15}+\dfrac{-36}{15}+\dfrac{-28}{15}$
$=\dfrac{-54}{15}$
$=\dfrac{-18}{5}$
$(\dfrac{7}{6}-\dfrac{5}{4}):\dfrac{4}{9}:\dfrac{-5}{28}$
$=\dfrac{-1}{12}\cdot\dfrac{9}{4}\cdot\dfrac{-28}{5}$
$=\dfrac{252}{240}$
$=\dfrac{21}{20}$
$\dfrac{-1}{30}-(\dfrac{4}{5}-\dfrac{4}{15}):\dfrac{4}{3}$
$=\dfrac{-1}{30}-\dfrac{8}{15}\cdot\dfrac{3}{4}$
$=\dfrac{-1}{30}-\dfrac{2}{5}$
$=\dfrac{-13}{30}$
$\dfrac{-5}{11}:\dfrac{12}{15}-\dfrac{6}{11}:\dfrac{12}{25}$
$=\dfrac{-5}{11}\cdot\dfrac{15}{12}-\dfrac{6}{11}\cdot\dfrac{25}{12}$
$=\dfrac{-25}{44}-\dfrac{25}{22}$
$=\dfrac{-75}{44}$
$(\dfrac{3}{5}-\dfrac{4}{45}):\dfrac{-5}{18}$
$=\dfrac{23}{45}\cdot\dfrac{-18}{5}$
$=\dfrac{-414}{225}$
$=\dfrac{-46}{25}$
