1: 2 × (3 × 5 - 3) 2: 2 × ((3 × 5) - 3) 3: (2 5) × 3 3 4: ((2 5) × 3) 3 5: 2 × (5 × 3 - 3) 6: 2 × ((5 × 3) - 3) 7: 3 (2 5) × 3 8: 3 ((2 5) × 3) 9: (3 × (2 5)) 3 10: 3 × (2 5) 3 11: 3 (3 ...