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Column 1

1

8 + 4

12

2

91+6

97

2

28-9

19

2

98-9

89

2

47+20

67

Column 2

1

8-6

2

2

28-9

19

2

62+18

80

2

62+14

76

2

83-67

16

Column 3

1

49-46

3

2

52+26

78

2

63-45

18

2

67+3

70

2

54+27

81

Column 4

1

10-9

1

2

71+8

79

2

74+16

90

2

59+31

90

2

17+27+15+13

72