mutilpaction
addition
minus
100

3*3

9

100

23+1

24

100

1-1

0

200

1*1

1

200

12+1

13

200

45-9

26

300

3*4

12

300

33+4

37

300

11-1

10

400

2*12 

24

400

3+0

3

400

9-9

0

500

12*3 

36

500

12+4

16

500

33-1

32

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