$\dfrac{3}{6}+\dfrac{4}{6}$ =

$\dfrac{18}{60}+\dfrac{-7}{60}$ =

$\dfrac{3}{4}+\dfrac{-18}{44}$ =

$\dfrac{2}{4}+\dfrac{-15}{44}$ =

$6+\dfrac{-26}{5}$ =

$\dfrac{-17}{21}+\dfrac{3}{3}$ =

$\dfrac{2}{3}-\dfrac{6}{21}$ =

$\dfrac{5}{3}+\dfrac{11}{7}$ =

$\dfrac{3}{5}+\dfrac{11}{7}$ =

$\dfrac{37}{4}+2$ =