− 4 3a 2a 4 − 6 5a July 8, 2019 16 32 64 128 (6a ^ 3 - 4)/(5a) - (a ^ 3 - 4)/(5a) (2a)/(2a + 3) + 5/(3 - 2a) - (4a ^ 2 + 9)/(4a ^ 2 - 9) 2) (5a ^ 4 + 1/3 * a ^ 3) / (a ^ 2) - (4a ^ 3) / (2a) + (2a) ^ 2 4(3a - 2) - 6(2a + 1) (4a + 2)(6a2 − a + 2)