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