Question

factor (y-1)(y+6)/(y-5)(y+2) x (y-5)(y+1)/(y-1)(y+3)

Answer 1

$$\bf \cfrac{\cancel{(y-1)}(y+6)}{\cancel{(y-5)}(y+2)}
\times \cfrac{\cancel{(y-5)}(y+1)}{\cancel{(y-1)}(y+3)}
$$

and multiply across