11-16/23 + (4-14/23 + 7-13/23) = 11 - 16/23 + 4 - 14/23 + 7 - 13/23= 11 + 4 + 7 - (16/23 + 14/23 + 13/23)= 22 - 43/23= 22 - 1 20/23= 20 3/23
11-16/23 + (4-14/23 + 7-13/23) = 11 - 16/23 + 4 - 14/23 + 7 - 13/23
= 11 + 4 + 7 - (16/23 + 14/23 + 13/23)
= 22 - 43/23
= 22 - 1 20/23
= 20 3/23