5 12a 1 4 2 3a 8 July 8, 2019 16 32 64 128 A 1 2 3 4 5 6 2 5(4a-8b)-(3a-4b)*1 4 5(- 1 4a + 3) - (1 - 2 5a) - 4(0 8a + 3)
