7779
1
=
79
7
−
7
2
=
79
−
77
3
=
9
−
(
7
−
7
7
)
4
=
7
7
−
7
+
9
5
=
77
7
−
9
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6
=
7
−
9
7
−
7
7
=
9
−
7
+
7
7
8
=
77
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−
9
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=
(
7
−
7
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⋅
7
+
9
10
=
7
7
−
7
+
9
11
=
7
+
7
7
+
9
12
=
7
+
7
+
7
−
9
13
=
7
−
7
+
7
+
9
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14
=
77
−
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⋅
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15
=
7
−
7
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=
7
−
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=
7
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+
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9
18
=
7
+
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9
19
=
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20
=
97
−
77
21
=
(
9
−
7
)
⋅
7
+
7
22
=
7
7
+
7
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9
23
=
7
⋅
7
+
7
+
9
24
=
(
7
7
+
7
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⋅
9
25
=
7
7
+
(
7
−
9
)
!
26
=
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27
=
9
7
−
7
7
28
=
77
+
7
9
29
=
9
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7
!
+
7
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−
7
30
=
79
−
7
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7
31
=
(
7
7
+
9
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7
32
=
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33
=
77
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34
=
7
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7
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35
=
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7
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7
36
=
9
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38
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+
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39
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−
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40
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41
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44
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45
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9
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97
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−
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=
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7
51
=
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52
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9
53
=
77
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7
−
9
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!
54
=
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7
−
7
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9
55
=
7
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7
+
9
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56
=
77
−
7
⋅
9
57
=
777
−
9
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!
58
=
7
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9
59
=
7
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7
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61
=
77
−
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63
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7
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9
64
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7
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65
=
79
−
7
−
7
66
=
77
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67
=
77
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68
=
7
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69
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70
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7
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79
−
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71
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9
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72
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79
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73
=
77
−
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9
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77
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9
76
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77
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77
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77
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7
78
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79
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7
79
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77
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9
80
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7
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79
81
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77
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7
−
9
82
=
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83
=
97
−
7
−
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84
=
(
7
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9
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7
−
7
85
=
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86
=
7
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+
79
87
=
77
+
7
+
9
88
=
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89
=
(
7
+
7
)
⋅
7
−
9
90
=
97
−
7
⋅
7
91
=
(
7
+
7
)
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7
92
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7
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7
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9
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93
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77
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7
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9
94
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95
=
(
7
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7
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7
−
9
96
=
97
−
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7
97
=
97
−
7
+
7
98
=
7
7
+
97
99
=
77
7
⋅
9
100
=
?