Помогите сократить дробь
(25х^2 + 30 xy + 9y^2 - 25х^2 + 30 xy - 9y^2)/y = 60xy/y = 60x
(5x+3y)^2-(5x-3y)^2/y = (5x+3y-5x+3y)(5x+3y+5x-3y)/y = 6y10x/y = 6*10x = 60x