1) 5/9 + 5/7 × (8/3 - 5/4) × 3/4
5/9 + 5/7 × 32-15/12 × 3/4
5/9 + 5/7 × 17/12 × 3/4
5/9 + 5/7 + 17/4 + 1/4
5/9 + 85/112
570+765/1008
1325/1008
2) 2 - 3 × 1/7 × (2 - 9/11) × 21/8
2 - 3 × 22 - 9/11 × 3/8
2 - 3 × 13/11 × 3/8
2 - 3 × 39/88
2 - 117/88
176 - 117/88
59/88