Срочно!!! Алгебра ... Помогите пожалуйста ?

вас там чё. уже на телефонах заставляют решать?

= [y*(y^2 - x^2)]/x * [4/(y+x)(y-x) - 7/(x+y)^2] =

= [y*(y^2 - x^2)]/x * [- 4/(x+y)(x-y) - 7/(x+y)^2] =

= [y*(y^2 - x^2)]/x * [- 4*(x+y) - 7*(x-y)]/(x-y)(x+y)^2 =

= [y*(y^2 - x^2)]/x * [- 4x + 4y - 7x + 7y)]/(x-y)(x+y)^2 =

= [y*(y^2 - x^2)]/x * (- 11x + 11y)/(x-y)(x+y)^2 =

= [y*(y^2 - x^2)]/x * (- 11)*(x - y) / (x - y)(x+y)^2 =

= [y*(y^2 - x^2)]/x * (- 11)/(x+y)^2 =

= (-y) * (x+y)(x-y) * (-11) / (x * (x+y)^2) =

= 11y*(x-y) / x*(x+y)