A 3 6a 2 9a 4i 0 July 8, 2019 16 32 64 128 (a - 3)/(a ^ 2 - 6a + 9) (4a ^ 2 - 1)/(a ^ 2 - 9) / ((6a + 3)/(a + 3)) (a ^ 3 - 6a) ^ 2 2) (4a ^ 2 - 1)/(a ^ 2 - 9) / ((6a + 3)/(a + 3))
