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1
1+90=?????
999999
19
91
2
12-12=????????
0
-8
3
15x15=??????
522
225
4
999x9=??????
018
09
*-1
8991
5
25% de 500=???????
521
125
6
12+X=171 X=????
159
028
7
J,D J=3xD D+J=120 J=????????????
56
30
70
90