Question

((6/y)+y)/((7/y)-y)

Answer 1

6/y + y = (6 + y^2)/y

Other part, the same.

(a/b divided by c/d same as a/b * d/c and your bottom y's will cancel)

Answer 2

((6+y^2)/y)/((7-y^2)/y) =((6+y^2)/y)*(y/(7-y^2) =(6+y^2)/(7-y^2)