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+
-
x
100
9+2
11
100
2-2
0
100
1x1
1
200
5+100
105
200
5-5
0
200
2x2
4
300
10+50
60
300
1-2
-1
300
5x5
25
400
90+10
100
400
4-5
-1
400
9x9
81