7778
1
=
78
−
77
2
=
8
−
(
7
−
7
7
)
3
=
77
7
−
8
4
=
8
7
+
7
7
5
=
7
−
8
!
7
!
+
7
!
6
=
(
77
7
−
8
)
!
7
=
8
−
7
7
−
7
8
=
78
−
7
−
7
9
=
7
7
−
7
+
8
10
=
87
−
77
11
=
(
77
7
)
8
12
=
?
13
=
7
+
7
+
7
−
8
14
=
7
−
7
7
+
8
15
=
7
−
7
+
7
+
8
16
=
7
+
7
7
⋅
8
17
=
(
8
!
7
!
+
7
!
)
!
−
7
18
=
?
19
=
77
7
+
8
20
=
?
21
=
77
−
7
⋅
8
22
=
7
⋅
7
+
7
+
8
23
=
?
24
=
8
!
77
−
7
25
=
?
26
=
?
27
=
7
+
7
!
7
+
8
28
=
77
−
7
8
29
=
78
−
7
⋅
7
30
=
?
31
=
(
8
!
7
!
+
7
!
)
!
+
7
32
=
?
33
=
?
34
=
7
⋅
7
−
7
−
8
35
=
7
8
−
7
−
7
36
=
(
7
−
7
7
)
8
37
=
?
38
=
87
−
7
⋅
7
39
=
?
40
=
?
41
=
7
⋅
7
⋅
7
−
8
42
=
(
7
+
7
−
8
)
⋅
7
43
=
?
44
=
?
45
=
7
!
7
+
7
8
46
=
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47
=
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48
=
(
7
−
7
7
)
⋅
8
49
=
(
8
−
7
7
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7
50
=
7
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7
−
7
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8
51
=
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52
=
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53
=
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54
=
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55
=
7
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8
−
7
7
56
=
(
7
−
7
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7
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8
57
=
7
7
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7
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8
58
=
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59
=
?
60
=
?
61
=
?
62
=
77
−
7
−
8
63
=
7
!
87
−
7
64
=
78
−
7
−
7
65
=
?
66
=
?
67
=
?
68
=
?
69
=
77
−
8
!
7
!
70
=
7
⋅
8
+
7
+
7
71
=
78
−
7
⋅
7
72
=
(
7
7
+
8
)
!
7
!
73
=
87
−
7
−
7
74
=
?
75
=
?
76
=
77
+
7
−
8
77
=
(
8
−
7
)
⋅
77
78
=
77
−
7
+
8
79
=
7
7
+
78
80
=
87
−
7
⋅
7
81
=
?
82
=
?
83
=
7
!
7
8
−
7
84
=
(
77
+
7
)
8
85
=
7
⋅
7
+
78
86
=
87
−
7
7
87
=
87
−
7
+
7
88
=
77
7
⋅
8
89
=
7
!
8
−
7
7
90
=
(
7
+
7
)
⋅
7
−
8
91
=
7
!
8
+
7
7
92
=
77
+
7
+
8
93
=
?
94
=
7
⋅
7
+
87
95
=
?
96
=
?
97
=
7
!
7
8
+
7
98
=
(
7
+
8
)
⋅
7
−
7
99
=
?
100
=
?