9 a 3 )=- 4 a 2 July 8, 2019 16 32 64 128 9 3 4 2 1 6 9 3 4 2 5 9 3 4 2 1 9 3 4 2 5 8 9 3 4 2 5 6 9 3 4 2 7 8 9 3 4 2 1 5 9 3 4 2 7 9 3 4 2 8 9 3 4 2 6 9 3 4 2 1 8 9 3 4 20 9 3 4 10x 20 9 3 4 x 2 9 5x 3 4 2