2778
1
=
(
8
−
7
)
27
2
=
28
7
+
7
3
=
7
−
28
7
4
=
28
7
⋅
7
5
=
82
−
77
6
=
78
−
72
7
=
77
−
28
8
=
78
−
2
⋅
7
9
=
28
7
+
7
10
=
72
8
+
7
11
=
28
7
+
7
12
=
27
−
7
−
8
13
=
77
−
8
2
14
=
28
−
7
−
7
15
=
87
−
72
16
=
72
8
+
7
17
=
(
28
7
)
!
−
7
18
=
8
2
+
7
+
7
19
=
27
−
8
!
7
!
20
=
7
−
2
+
7
+
8
21
=
7
⋅
7
−
28
22
=
7
8
−
27
23
=
2
7
8
+
7
24
=
(
7
7
+
2
)
⋅
8
25
=
2
7
⋅
8
−
7
26
=
27
+
7
−
8
27
=
(
8
−
7
)
⋅
27
28
=
27
−
7
+
8
29
=
7
⋅
8
−
27
30
=
2
⋅
8
+
7
+
7
31
=
(
28
7
)
!
+
7
32
=
78
2
−
7
33
=
82
−
7
⋅
7
34
=
7
2
−
7
−
8
35
=
7
⋅
7
+
28
36
=
(
7
+
7
)
⋅
2
+
8
37
=
(
7
+
8
)
⋅
2
+
7
38
=
87
−
7
2
39
=
7
⋅
7
−
2
−
8
40
=
87
−
7
2
41
=
287
7
42
=
27
+
7
+
8
43
=
(
7
−
2
)
⋅
7
+
8
44
=
(
7
+
7
+
8
)
⋅
2
45
=
7
⋅
7
−
8
2
46
=
78
2
+
7
47
=
87
+
7
2
48
=
7
2
+
7
−
8
49
=
77
−
28
50
=
2
7
−
78
51
=
78
−
27
52
=
2
+
7
+
7
8
53
=
77
−
(
8
2
)
!
54
=
7
⋅
7
⋅
8
−
2
55
=
7
⋅
7
−
2
+
8
56
=
72
−
8
⋅
7
57
=
72
−
7
−
8
58
=
7
⋅
7
⋅
8
+
2
59
=
7
⋅
7
+
2
+
8
60
=
87
−
27
61
=
77
−
2
⋅
8
62
=
7
!
72
−
8
63
=
72
⋅
7
8
64
=
78
−
2
⋅
7
65
=
7
⋅
8
+
2
+
7
66
=
?
67
=
77
−
2
−
8
68
=
82
−
7
−
7
69
=
78
−
2
−
7
70
=
2
⋅
7
+
7
⋅
8
71
=
72
+
7
−
8
72
=
(
8
−
7
)
⋅
72
73
=
72
−
7
+
8
74
=
2
+
7
8
−
7
75
=
77
−
8
2
76
=
7
8
+
27
77
=
7
⋅
7
+
28
78
=
87
−
2
−
7
79
=
8
2
+
77
80
=
8
!
72
⋅
7
81
=
8
2
+
77
82
=
82
−
7
+
7
83
=
7
⋅
8
+
27
84
=
87
−
2
+
7
85
=
77
2
+
8
86
=
?
87
=
72
+
7
+
8
88
=
2
7
−
7
⋅
8
89
=
7
⋅
7
+
82
90
=
2
+
7
+
87
91
=
(
7
−
2
+
8
)
⋅
7
92
=
2
⋅
7
+
78
93
=
2
⋅
8
+
77
94
=
87
2
+
7
95
=
?
96
=
82
+
7
+
7
97
=
2
+
7
!
!
8
+
7
98
=
28
⋅
7
⋅
7
99
=
?
100
=
(
2
+
7
+
7
)
8