$\dfrac{5}{18}+\dfrac{30}{18}$ =

$\dfrac{20}{33}-\dfrac{10}{33}$ =

$\dfrac{1}{33}+\dfrac{2}{11}$ =

$\dfrac{4}{4}+\dfrac{-31}{20}$ =

$3-\dfrac{73}{21}$ =

$\dfrac{3}{5}-\dfrac{1}{15}$ =

$\dfrac{2}{3}+\dfrac{7}{5}$ =

$\dfrac{1}{15}+\dfrac{5}{5}$ =

$\dfrac{-53}{15}+4$ =

$\dfrac{3}{5}+\dfrac{2}{7}$ =