e: \(=\dfrac{-10}{36}+\dfrac{7}{36}=\dfrac{-3}{36}=-\dfrac{1}{12}\)
f: \(=\dfrac{-8}{21}+\dfrac{-12}{21}=\dfrac{-20}{21}\)
g: \(=\dfrac{-40}{55}+\dfrac{4}{55}=\dfrac{-36}{55}\)
h: \(=\dfrac{-6}{8}-\dfrac{5}{8}=\dfrac{-11}{8}\)
i: \(=\dfrac{5}{5}-\dfrac{3}{5}=\dfrac{2}{5}\)
j: \(=\dfrac{-2}{5}-\dfrac{15}{5}=\dfrac{-17}{5}\)
k: \(=\dfrac{-21}{7}-\dfrac{5}{7}=\dfrac{-26}{7}\)
l: \(=\dfrac{-12}{6}-\dfrac{5}{6}=\dfrac{-17}{6}\)
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