Question 328764
Dividing by a fraction is the same as multiplying by its reciprocal,
{{{((y^2-25)/y)/((y+5)/(y+7))=(((y-5)(y+5))/y)*((y+7)/(y+5))}}}
{{{((y^2-25)/y)/((y+5)/(y+7))=(((y-5)cross((y+5)))/y)*((y+7)/cross((y+5)))}}}

{{{((y^2-25)/y)/((y+5)/(y+7))=((y-5)(y+7))/y}}}