6 x 2 )- 15 3 2 x 1 July 8, 2019 16 32 64 128 3 x 6 2 16 3 x 6 15 2 * 3 x 1 2 5 x − 15 3 6 3 2 x − 12 4 3 6 15 x 2 5 8 x 2 1 17 6 x 2/15 15 x 6 1/2