$\dfrac{5}{6}\times\dfrac{15}{14}$ =

$\dfrac{11}{10}\times\dfrac{35}{19}$ =

$\dfrac{3}{-23}\times\dfrac{9}{-2}$ =

$\dfrac{2}{3}\times\dfrac{5}{9}$ =

$\dfrac{10}{4}\times\dfrac{7}{17}$ =

$\dfrac{13}{70}\times 3$ =

$\dfrac{5}{2}\times\dfrac{3}{23}$ =

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

$-9 \times\dfrac{13}{39}$ =

$3 \times\dfrac{9}{9}$ =