(15 * x ^ 8 * y ^ 6) / (55 * x ^ 4 * y ^ 7) = (5 * x ^ 8 * y ^ 6) / (11 * x ^ 4 * y ^ 7) = (5 * x ^ 4 * 1) / (11 * 1 * y) = (5 * x ^ 4) / (11 * y)
(15 * x ^ 8 * y ^ 6) / (55 * x ^ 4 * y ^ 7) = (5 * x ^ 8 * y ^ 6) / (11 * x ^ 4 * y ^ 7) = (5 * x ^ 4 * 1) / (11 * 1 * y) = (5 * x ^ 4) / (11 * y)