1:(3 - 9) × (5 - 9)
2:(9 - 3) × (9 - 5)
3:9 ÷ 3 × 5 + 9
4:(9 ÷ 3) × 5 + 9
5:(9 ÷ 3 × 5) + 9
6:((9 ÷ 3) × 5) + 9
7:(9 ÷ (3 ÷ 5)) + 9
8:9 ÷ (3 ÷ 5) + 9
9:9 + 9 ÷ 3 × 5
10:9 + (9 ÷ 3) × 5
11:9 + (9 ÷ 3 × 5)
12:9 + ((9 ÷ 3) × 5)
13:9 + (9 ÷ (3 ÷ 5))
14:9 + 9 ÷(3 ÷ 5)
15:9 + 9 × 5 ÷ 3
16:9 + (9 × 5) ÷ 3
17:9 + (9 × 5 ÷ 3)
18:9 + ((9 × 5) ÷ 3)
19:9 + (9 × (5 ÷ 3))
20:9 + 9 ×(5 ÷ 3)
21:9 + 5 ÷ 3 × 9
22:9 + (5 ÷ 3) × 9
23:9 + (5 ÷ 3 × 9)
24:9 + ((5 ÷ 3) × 9)
25:9 + (5 ÷ (3 ÷ 9))
26:9 + 5 ÷(3 ÷ 9)
27:9 × 5 ÷ 3 + 9
28:(9 × 5) ÷ 3 + 9
29:(9 × 5 ÷ 3) + 9
30:((9 × 5) ÷ 3) + 9
31:(9 × (5 ÷ 3)) + 9
32:9 × (5 ÷ 3) + 9
33:9 + 5 × 9 ÷ 3
34:9 + (5 × 9) ÷ 3
35:9 + (5 × 9 ÷ 3)
36:9 + ((5 × 9) ÷ 3)
37:9 + (5 × (9 ÷ 3))
38:9 + 5 ×(9 ÷ 3)
39:(9 - 5) × (9 - 3)
40:5 ÷ 3 × 9 + 9
41:(5 ÷ 3) × 9 + 9
42:(5 ÷ 3 × 9) + 9
43:((5 ÷ 3) × 9) + 9
44:(5 ÷ (3 ÷ 9)) + 9
45:5 ÷ (3 ÷ 9) + 9
46:(5 - 9) × (3 - 9)
47:5 × 9 ÷ 3 + 9
48:(5 × 9) ÷ 3 + 9
49:(5 × 9 ÷ 3) + 9
50:((5 × 9) ÷ 3) + 9
51:(5 × (9 ÷ 3)) + 9
52:5 × (9 ÷ 3) + 9
这是所有可能
所以以你的要求来说
这个就无解了