(x :(x+y) - (x-y) : x ) :(y:x)

Question

(x :(x+y) - (x-y) : x ) :(y:x)

Answer 1

(x/(x+y)-(x-y)/x)*(x/y)=((x^2-x^2+y^2)/x(x+y))*(x/y)=(y^2/x(x+y))(x/y)=y/(x+y)