e: \(=\dfrac{1}{6}+\dfrac{5}{4}-\dfrac{3}{2}+1=\dfrac{2}{12}+\dfrac{15}{12}-\dfrac{18}{12}+\dfrac{12}{12}=\dfrac{11}{12}\)
f: \(=\left(-\dfrac{3}{4}-\dfrac{1}{4}\right)\cdot\dfrac{1}{-5}+\dfrac{1}{15}-\dfrac{1}{15}=-1\cdot\dfrac{-1}{5}=\dfrac{1}{5}\)
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