2 : 1/4 +((1 1/2 + 2 2/3 ) :3 3/4 - 2/3) 8 8/9 = 14 58/81
1) 1 1/2 + 2 2/3 = 3/2 + 8/3 = 9/6 + 16/3 = 25/3
2) 25/3 ÷ 3 3/4 = 25/3 × 4/15 = 5/3 × 4/3 = 20/9 = 2 2/9
3) 20/9 - 2/3 = 20/9 - 6/9 = 14/9 = 1 5/9
4) 2 ÷ 1/4 = 2/1 × 4/1 = 8
5) 14/9 × 8 8/9 = 14/9 × 80/9 = 1120/81
6) 8 + 1120/81 = 72/81 + 1120/81 = 1192/81 = 14 58/81