24种算法呢
﹙6+2﹚×﹙4-1﹚
[6÷﹙2-1﹚]×4
﹙2-1﹚×﹙6×4﹚
6÷[﹙2-1﹚÷4]
[6×﹙2-1﹚]×4
﹙4×6﹚×﹙2-1﹚
﹙4×6﹚÷﹙2-1﹚
4÷[﹙2-1﹚÷6]
﹙2-1﹚×﹙4×6﹚
6×[4÷﹙2-1﹚]
﹙4-1﹚×﹙6+2﹚
[4×﹙2-1﹚]×6
﹙2+6﹚×﹙4-1﹚
﹙6×4﹚÷﹙2-1﹚
4×[6×﹙2-1﹚]
[﹙2-1﹚×6]×4
6×[4×﹙2-1﹚]
[4÷﹙2-1﹚]×6
﹙6×4﹚×﹙2-1﹚
[﹙2-1﹚×4]×6
4×[﹙2-1﹚×6]
4×[6÷﹙2-1﹚]
﹙4-1﹚×﹙2+6﹚
6×[﹙2-1﹚×4]