1.(-÷4×)÷
2.(111+999)÷[56×(-)]
3.(+)×160×
4.15-(÷2+5)
5.6.4÷+1.25×3
6.[0.25×4-(+)]×
7.×+×
8.+(+)×
9.×(+)÷
10.×[280÷(7.28+6.72)]
11.(140)15.6÷[32×(1-)÷3.6]
12.-÷+
13.(-×)÷
14.×++
15.÷〔(-)×〕
16.6×(+)-
17.2-÷-
18.-(÷+)
19.〔2-(+)〕÷
20.1-(÷+)
21.÷+÷-
22.(1-÷)×
23.(-×)÷
24.〔-(-)〕÷
25.×〔1÷(+)〕
26.(×+)÷
27.÷5+÷+0.2
28.÷〔(-)÷〕
29.〔4-(-)〕÷
30.÷〔×(+)〕
31.3-×-
32.÷〔(-)×〕
33.÷3+×
34.++÷
35.72×(–+)
36.2–÷–
37.+×+
38.+×+
39.×+÷7
40.4–÷–
41.×(9+)–
42.÷+×
43.+÷+
44.2–×–
45.30×(+–)
46.+÷+
47.6–×–
48.×+÷5
49.12×(–+)
50.+×+
51.4–÷–
48×(–+)
52.÷9+×
53.24×(+)
54.(+)×60–27
55.5––
56.(–)×70
57.97×
58.×8+×2
59.15×+15×
60.(+–)×72
61.72×(–+)
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