1) (2x - 2y) / (y * 3y) = (2x - 2y) / (3y^2) = 2(x - y) / 3y^2
2) (xy - 5y) / (x^2 - 25) = y(x - 5) / ((x - 5)(x + 5)) = y / (x + 5)
3) ((x / y^2) - 1) / ((1 / y) + (1 / x)) = ((x - y^2) / y^2) / ((x + y) / (xy)) = (x - y^2) / (y(x + y))
4) (p^2 - 11p + 10) / (20 + 8p - p^2) = (p - 10)(p - 1) / (5(4 + p)(4 - p)) = (p - 10)(p - 1) / -(5)(p + 4)(p - 4) = (p - 10)(p - 1) / (5)(p + 4)(p - 4)
1) (2x - 2y) / (y * 3y) = (2x - 2y) / (3y^2) = 2(x - y) / 3y^2
2) (xy - 5y) / (x^2 - 25) = y(x - 5) / ((x - 5)(x + 5)) = y / (x + 5)
3) ((x / y^2) - 1) / ((1 / y) + (1 / x)) = ((x - y^2) / y^2) / ((x + y) / (xy)) = (x - y^2) / (y(x + y))
4) (p^2 - 11p + 10) / (20 + 8p - p^2) = (p - 10)(p - 1) / (5(4 + p)(4 - p)) = (p - 10)(p - 1) / -(5)(p + 4)(p - 4) = (p - 10)(p - 1) / (5)(p + 4)(p - 4)