1:(1 + 2 + 3) × 4
2:((1 + 2) + 3) × 4
3:(1 + (2 + 3)) × 4
4:1 × 2 × 3 × 4
5:(1 × 2) × 3 × 4
6:(1 × 2 × 3) × 4
7:((1 × 2) × 3) × 4
8:(1 × (2 × 3)) × 4
9:1 × (2 × 3) × 4
10:1 × (2 × 3 × 4)
1:(1 + 2 + 3) × 4
2:((1 + 2) + 3) × 4
3:(1 + (2 + 3)) × 4
4:1 × 2 × 3 × 4
5:(1 × 2) × 3 × 4
6:(1 × 2 × 3) × 4
7:((1 × 2) × 3) × 4
8:(1 × (2 × 3)) × 4
9:1 × (2 × 3) × 4
10:1 × (2 × 3 × 4)