d: \(=\dfrac{-5}{9}+\dfrac{5}{9}:\dfrac{20-25}{12}\)
\(=\dfrac{-5}{9}+\dfrac{5}{9}\cdot\dfrac{12}{-5}=\dfrac{-5}{9}-\dfrac{5}{9}\cdot\dfrac{12}{5}=\dfrac{-5}{9}\cdot\dfrac{17}{5}=-\dfrac{17}{9}\)
e: \(=\dfrac{1}{7}-\dfrac{1}{7}-3\cdot\dfrac{4}{3}\cdot4=-16\)
f: \(=\dfrac{3}{2}\cdot\dfrac{4}{3}\cdot...\cdot\dfrac{100}{99}=\dfrac{100}{2}=50\)