3999
1
=
39
9
−
9
2
=
3
⋅
9
−
9
9
3
=
9
9
9
3
4
=
39
9
−
9
5
=
99
9
−
3
!
6
=
99
−
93
7
=
9
−
(
3
−
9
9
)
8
=
99
9
−
3
9
=
(
9
−
9
)
⋅
3
+
9
10
=
39
−
9
9
11
=
99
3
9
12
=
93
−
9
⋅
9
13
=
39
⋅
9
9
14
=
99
9
+
3
15
=
99
−
9
3
!
16
=
39
+
9
9
17
=
99
9
+
3
!
18
=
(
99
+
9
)
⋅
3
19
=
99
−
3
!
!
9
20
=
9
!
3
+
9
+
9
21
=
39
−
9
−
9
22
=
39
9
+
9
23
=
9
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3
−
9
9
24
=
99
3
−
9
25
=
93
9
−
9
!
26
=
3
⋅
9
−
9
9
27
=
39
−
9
−
9
28
=
93
−
9
9
29
=
93
−
9
!
9
30
=
99
−
9
3
31
=
93
⋅
9
9
32
=
99
−
3
9
33
=
99
⋅
3
9
34
=
93
+
9
9
35
=
99
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3
!
9
36
=
99
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9
3
37
=
39
−
9
!
9
38
=
39
−
9
9
39
=
39
−
9
+
9
40
=
9
9
+
39
41
=
9
!
9
+
39
42
=
9
⋅
9
−
39
43
=
3
!
!
9
+
9
+
9
44
=
9
!
!
9
−
3
!
⋅
9
!
45
=
39
−
9
+
9
46
=
3
!
!
9
+
9
+
9
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47
=
9
!
3
!
!
9
−
9
48
=
9
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9
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39
49
=
3
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!
9
+
9
+
9
50
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9
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3
!
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9
−
9
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51
=
39
+
9
+
9
52
=
9
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9
−
9
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3
53
=
3
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⋅
9
−
9
9
54
=
(
9
−
9
3
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9
55
=
3
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⋅
9
+
9
9
56
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9
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(
9
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3
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!
9
57
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39
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9
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9
58
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(
9
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3
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9
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−
9
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59
=
9
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3
!
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9
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9
60
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99
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39
61
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(
9
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3
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9
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−
9
62
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93
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9
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9
63
=
(
9
−
3
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⋅
9
+
9
64
=
(
9
9
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3
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9
65
=
9
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3
!
!
9
+
9
66
=
9
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39
67
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9
3
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9
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9
68
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3
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9
−
9
−
9
69
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9
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3
−
9
70
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3
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−
9
9
−
9
71
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(
9
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3
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!
9
−
9
72
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99
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3
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9
73
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(
9
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3
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9
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9
74
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3
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!
9
−
9
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9
75
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93
−
9
−
9
76
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3
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−
9
9
−
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77
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(
9
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3
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!
9
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9
78
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9
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9
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9
3
79
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(
9
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3
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9
9
80
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9
3
−
9
9
81
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93
−
9
−
9
82
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9
3
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9
9
83
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(
9
−
3
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!
9
+
9
84
=
93
−
9
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9
85
=
3
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!
−
9
9
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9
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86
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3
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!
9
−
9
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9
87
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99
−
3
−
9
88
=
3
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!
−
9
9
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9
89
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(
9
−
3
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!
9
+
9
90
=
(
39
−
9
)
⋅
9
91
=
99
+
3
!
!
9
92
=
93
−
9
9
93
=
93
−
9
+
9
94
=
9
9
+
93
95
=
9
!
9
+
93
96
=
99
−
9
3
97
=
99
−
9
!
3
98
=
99
−
3
9
99
=
93
−
9
+
9
100
=
3
9
+
99