1778
1
=
(
8
−
7
)
17
2
=
81
−
77
3
=
17
+
7
8
4
=
81
−
77
5
=
7
−
(
81
−
7
)
6
=
(
17
+
7
8
)
!
7
=
78
−
71
8
=
71
−
7
8
9
=
71
−
8
7
10
=
17
−
8
+
7
11
=
77
8
−
1
12
=
17
+
8
+
7
13
=
177
−
8
14
=
(
81
−
7
)
⋅
7
15
=
71
−
7
⋅
8
16
=
87
−
71
17
=
(
8
−
7
)
⋅
17
18
=
17
−
7
+
8
19
=
7
7
+
18
20
=
(
7
⋅
7
+
1
)
⋅
8
21
=
17
−
8
⋅
7
22
=
1
⋅
7
+
7
+
8
23
=
81
+
7
+
7
24
=
(
81
−
77
)
!
25
=
7
⋅
7
+
18
26
=
?
27
=
7
!
7
+
81
28
=
(
7
−
81
)
⋅
7
29
=
(
7
−
1
)
8
−
7
30
=
?
31
=
7
⋅
7
−
18
32
=
17
+
7
+
8
33
=
?
34
=
(
7
−
1
)
⋅
7
−
8
35
=
17
+
8
⋅
7
36
=
(
7
−
1
7
)
8
37
=
?
38
=
?
39
=
7
⋅
8
−
17
40
=
7
!
18
⋅
7
41
=
1
⋅
7
⋅
7
−
8
42
=
7
⋅
7
+
1
−
8
43
=
7
⋅
7
−
81
!
44
=
?
45
=
?
46
=
7
⋅
7
−
81
47
=
?
48
=
(
7
−
1
7
)
⋅
8
49
=
7
81
−
7
50
=
(
7
−
1
)
⋅
7
+
8
51
=
?
52
=
7
⋅
7
+
81
53
=
?
54
=
?
55
=
(
7
−
1
)
⋅
8
+
7
56
=
71
−
7
−
8
57
=
1
⋅
7
⋅
7
+
8
58
=
7
⋅
7
+
81
59
=
77
−
18
60
=
?
61
=
78
−
17
62
=
7
⋅
8
−
1
+
7
63
=
(
17
−
8
)
⋅
7
64
=
71
−
7
⋅
8
65
=
81
!
7
!
−
7
66
=
7
8
+
17
67
=
7
⋅
7
+
18
68
=
77
−
81
69
=
77
⋅
1
−
8
70
=
87
−
17
71
=
(
8
−
7
)
⋅
71
72
=
71
−
7
+
8
73
=
7
⋅
8
+
17
74
=
77
−
81
75
=
?
76
=
77
−
1
8
77
=
(
18
−
7
)
⋅
7
78
=
1
8
+
77
79
=
1
7
+
78
80
=
(
17
−
7
)
⋅
8
81
=
81
−
7
+
7
82
=
7
7
+
81
83
=
77
+
81
!
84
=
77
−
1
+
8
85
=
77
⋅
1
+
8
86
=
77
+
81
87
=
1
7
⋅
87
88
=
1
7
+
87
89
=
7
!
7
8
−
1
90
=
(
7
−
1
)
⋅
(
7
+
8
)
91
=
7
!
7
8
+
1
92
=
?
93
=
87
−
1
+
7
94
=
87
⋅
1
+
7
95
=
17
+
78
96
=
?
97
=
(
7
−
1
)
!
8
+
7
98
=
(
7
−
1
+
8
)
⋅
7
99
=
?
100
=
(
17
−
7
)
8