1:(1 + 7) × (7 - 4)=24
2:(7 + 1) × (7 - 4)=24
3:(7 - 4) × (1 + 7)=24
4:(7 - 4) × (7 + 1)=24
1:(7 × 7 - 1) ÷ 2=24
2:((7 × 7) - 1) ÷ 2=24
1:(1 + 7) × (7 - 4)=24
2:(7 + 1) × (7 - 4)=24
3:(7 - 4) × (1 + 7)=24
4:(7 - 4) × (7 + 1)=24
1:(7 × 7 - 1) ÷ 2=24
2:((7 × 7) - 1) ÷ 2=24