a: \(=\dfrac{44}{5}-\dfrac{53}{10}-\dfrac{14}{5}=6-\dfrac{53}{10}=\dfrac{7}{10}\)
b: \(=\dfrac{-7}{19}\left(\dfrac{8}{11}+\dfrac{3}{11}\right)-\dfrac{12}{19}=\dfrac{-7}{19}-\dfrac{12}{19}=-1\)
c: \(=\left(-\dfrac{5}{9}-\dfrac{4}{9}\right)+\left(\dfrac{8}{15}+\dfrac{7}{15}\right)-\dfrac{2}{11}=-\dfrac{2}{11}\)
d: \(=\left(\dfrac{1}{99}+\dfrac{12}{999}-\dfrac{123}{9999}\right)\cdot\left(\dfrac{3-2-1}{6}\right)=0\)
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