$9 \times\dfrac{5}{-15}$ =

$7 \times\dfrac{15}{21}$ =

$\dfrac{25}{21}\times\dfrac{11}{10}$ =

$\dfrac{5}{30}\times\dfrac{19}{7}$ =

$\dfrac{3}{10}\times\dfrac{15}{14}$ =

$\dfrac{28}{-3}\times\dfrac{2}{-33}$ =

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

$\dfrac{13}{34}\times 3$ =

$\dfrac{2}{7}\times\dfrac{19}{5}$ =

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