2594,把这四个数字组成24,随便加减乘除,但不能重复数字,

1:(2 + 9 - 5) × 4
2:((2 + 9) - 5) × 4
3:(2 + (9 - 5)) × 4
4:(2 × (9 + 5)) - 4
5:2 × (9 + 5) - 4
6:(2 - 5 + 9) × 4
7:((2 - 5) + 9) × 4
8:(2 - (5 - 9)) × 4
9:(2 × (5 + 9)) - 4
10:2 × (5 + 9) - 4
11:(2 + 4) × (9 - 5)
12:(9 + 2 - 5) × 4
13:((9 + 2) - 5) × 4
14:(9 + (2 - 5)) × 4
15:(9 + 5) × 2 - 4
16:((9 + 5) × 2) - 4
17:(9 - 5 + 2) × 4
18:((9 - 5) + 2) × 4
19:(9 - (5 - 2)) × 4
20:(9 - 5) × (2 + 4)
21:(9 - 5) × (4 + 2)
22:(5 + 9) × 2 - 4
23:((5 + 9) × 2) - 4
24:(4 + 2) × (9 - 5)
25:4 × (2 + 9 - 5)
26:4 × ((2 + 9) - 5)
27:4 × (2 + (9 - 5))
28:4 × (2 - 5 + 9)
29:4 × ((2 - 5) + 9)
30:4 × (2 - (5 - 9))
31:4 × (9 + 2 - 5)
32:4 × ((9 + 2) - 5)
33:4 × (9 + (2 - 5))
34:4 × (9 - 5 + 2)
35:4 × ((9 - 5) + 2)
36:4 × (9 - (5 - 2))

(9+2-5)×4=24