2+1

(a)  

2-1

(a)  

1+1+1

(a)  

4-2

(a)  

3+1

(a)  

7-2

(a)  

41345698754+98765431239

(a)  

55+66+77+11+22+33+44+88+99+111+110+11+20+22+77+70

(a)  

912121211212+2211237

(a)  

13-10

(a)  

1+1+2+7

(a)  

11+22+2+77+7+1

(a)  

7+9+10

(a)  

19-7

(a)  

112+911+61+7

(a)  

112+111+222+11+2+22+1+3+33+333+1122

(a)  

1+1+1+1+1+1+1

(a)  

1+1+1+1+1+1+1+9

(a)  

9+9

(a)  

8-1

(a)  

10+8+1+7+9+2+11+10

(a)  

666+7+77+777

(a)  

6+1111+1+2+7

(a)  

2+1+1

(a)  

9-7

(a)  

10-7

(a)  

52+77+7+5+2+22

(a)  

171199161111+121171991

(a)  

112+111+222+1+1+1+1+1+1+1+1+1+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+11+11+22+22+11+22+11+22+22+11+22+11+1111+1+1+22+222+2+2+222222+3+33+333+333333333+321+1233+221133+112233+332211+123+321

(a)  

50-40

(a)  

22-2

(a)  

11-1

(a)  

112-12

(a)  

5+5+5

(a)  

7+8

(a)  

10+5

(a)  

14+1

(a)  

15+5+3+7+9+2

(a)  

del 1/999999999999999999999999999999999999999999999999999999999999999999999999999999999999998 como de difícil te fue?