$$\frac { 2 } { 7 y - 3 } \times \frac { 3 } { a y - 5 }$$
$\frac{6}{\left(7y-3\right)\left(ay-5\right)}$
$\frac{6\left(35+3a-14ay\right)}{\left(\left(7y-3\right)\left(ay-5\right)\right)^{2}}$
