1: 2 × (2 × 4 + 4)2: 2 × ((2 × 4) + 4)3: 2 × (4 + 2 × 4)4: 2 × (4 + (2 × 4))5: (2 × 4 - 2) × 46: ((2 × 4) - 2) × 47: 2 × (4 × 2 + 4)8: 2 × ((4 × 2) + 4)9: (2 × 4 + 4) × 210: ((2 × 4) + 4) × 211: 2 × (4 + 4 × 2)12: 2 × (4 + (4 × 2))13: (4 × 2 - 2) × 414: ((4 × 2) - 2) × 415: (4 + 2 × 4) × 216: (4 + (2 × 4)) × 217: (4 × 2 + 4) × 218: ((4 × 2) + 4) × 219: 4 × (2 × 4 - 2)20: 4 × ((2 × 4) - 2)21: (4 + 4 × 2) × 222: (4 + (4 × 2)) × 223: 4 × (4 × 2 - 2)24: 4 × ((4 × 2) - 2)
