1. 11 5/6 - 14 = 71/6 - (14/1 * 6/6) = 71/6 - 84/6 = - 13/6
2. 7 1/3 - 10,6 = 22/3 - 10 6/10 = 22/3 - 106/10 = ( 22*10 - 106*3)/30= (220-318)/30= - 98/30 = - 49/15
3.- 13/6 / 2,6 = - 13/6 / 2 6/10= - 13/6 / 26/10 = - 13/6 * 10/26= - 13/6 * 5/13 = - 1/6 * 5/1 = - 5/6
4. - 49/15 * 2 1/7 = - 49/15 * 15/7 = - 49/1 * 1/7 = - 7/1 * 1/1 = - 7/1
5. - 7/1 / 13 = 7/1 / 13/1 = 7/1 * 1/13 = 7/13
6. 7/13 / 2,6 = 7/13 / 26/10 = 7/13 * 10/26 = 7/13 * 5/13 = 35/169
7. - 5/6 + 35/ 169 = (-845 + 210)/1014= -635/1014
8. - 635/1014 + 12 5/6 = - 635/ (6*169) + 77/6= (-635+13013)/1014= 12378/1014= 2063/169= 12 35/169
Ответ. 12 35/169