2 - 3 1/7 * (2 - 1 9/11) : 8/11 = 2 - 22/7 * (22/11 - 20/11) : 8/11 = 2 - 22/7 * 2/11 : 8/11 = 2 - 44/77 * 11/8 = 2 - 11/14 = 28/14 - 11/14 = 17/14 = 1 3/14.
2 - 3 1/7 * (2 - 1 9/11) : 8/11 = 2 - 22/7 * (22/11 - 20/11) : 8/11 = 2 - 22/7 * 2/11 : 8/11 = 2 - 44/77 * 11/8 = 2 - 11/14 = 28/14 - 11/14 = 17/14 = 1 3/14.