Помогите с 3 заданием пожалуйста!!
Y^2/x^2-xy:(y/x+y-2xy/x^2-y^2)=
y^2/x(x-y):(y/x+y-2xy/(x-y)(x+y))=
y^2/x(x-y):(xy-x^2-2xy/(x-y)(x+y))=
y^2/x(x-y)*(x-y)(x+y)/-x^2-xy=-y^2/x^2
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Y^2/x^2-xy:(y/x+y-2xy/x^2-y^2)=
y^2/x(x-y):(y/x+y-2xy/(x-y)(x+y))=
y^2/x(x-y):(xy-x^2-2xy/(x-y)(x+y))=
y^2/x(x-y)*(x-y)(x+y)/-x^2-xy=-y^2/x^2