d: \(\dfrac{-7}{5};\dfrac{5}{-7};\dfrac{-7}{9};\dfrac{9}{-7};\dfrac{5}{9};\dfrac{9}{5};\dfrac{0}{5};\dfrac{0}{9};\dfrac{0}{7}\)
e: \(\dfrac{2}{3};\dfrac{3}{2};\dfrac{2}{5};\dfrac{5}{2};\dfrac{3}{5};\dfrac{5}{3}\)
f: \(-\dfrac{4}{7};\dfrac{7}{-4};\dfrac{0}{-4};\dfrac{0}{7}\)
