$\dfrac{-23}{10}\times\dfrac{-1}{5}$ =

$\dfrac{7}{5}\times\dfrac{10}{15}$ =

$\dfrac{5}{10}\times\dfrac{15}{17}$ =

$-15 \times\dfrac{7}{35}$ =

$\dfrac{19}{49}\times 2$ =

$\dfrac{35}{15}\times\dfrac{11}{10}$ =

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

$5 \times\dfrac{25}{25}$ =

$\dfrac{7}{10}\times\dfrac{7}{3}$ =

$\dfrac{3}{7}\times\dfrac{9}{5}$ =