$\dfrac{5}{15}+\dfrac{2}{15}$ =

$\dfrac{20}{18}-\dfrac{55}{18}$ =

$\dfrac{4}{22}+\dfrac{27}{44}$ =

$\dfrac{-5}{44}+\dfrac{6}{22}$ =

$1+\dfrac{-61}{40}$ =

$\dfrac{1}{12}+\dfrac{2}{6}$ =

$\dfrac{6}{6}+\dfrac{13}{12}$ =

$\dfrac{5}{3}+\dfrac{11}{4}$ =

$\dfrac{-17}{24}+1$ =

$\dfrac{11}{7}+\dfrac{2}{5}$ =