8899
1
=
89
89
2
=
9
−
(
8
+
8
−
9
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3
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98
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89
4
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9
8
−
8
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9
5
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9
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8
8
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9
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6
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98
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89
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7
=
88
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9
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9
8
=
9
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9
8
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8
9
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98
−
89
10
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89
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9
8
11
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99
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88
12
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89
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8
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9
13
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9
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88
14
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98
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8
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16
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8
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9
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89
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9
19
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98
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9
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21
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27
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28
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89
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29
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30
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98
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31
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32
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42
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50
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51
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89
90
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91
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93
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97
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98
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100
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8
8
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99