1 3 6x 12 )- 2 x 7 )= 19 July 8, 2019 16 32 64 128 12 x 6 + 1 6) (6 1x - 13 2) / 1 7=3 7. 1/3 * (6x - 1) 12. 1/2√7-6x-x^ 2