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15 questions
123+698
823
934
821
922
756-365
392
391
365
401
1931+2456
4354
4356
4389
4387
4789-2897
1832
1892
1965
1867
5569-4584
986
978
984
985
3678+2789
6467
6461
6458
6459
9678-8765
920
918
916
913
7865-3478
5679
4387
4389
4386
6987-4998
1978
1988
1986
1989
9786+8675
18465
18461
18463
18468
5876+4765
1111
1112
1123
1234
7890+9786
14532
17676
17089
78590
7654-6457
5697
5456
4532
1197
26756+97567
568387
124413
674978
637564
56737+67398
678485
573876
568356
124135
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