(     )-6+9=13

(     )+1-1=17

0+(     )-9=4

11-2+(     )=9

(     )+16-2=14

14-(     )+4=15

17+3-(     )=18

3-1+(     )=11

(     )-12+7=14

20-(     )+9=11

1-0+(     )=16

7-(     )+15=17

(     )+4-0=15

8-7+(     )=13

(     )-14+12=18

4-(     )+12=12

(     )-0+9=12

(     )+1-0=18

5-0+(     )=19

(     )+5-5=15

9+2-(     )=10

6+(     )-2=10

20+0-(     )=20

(     )-7+4=14

18+(     )-0=18

6-(     )+7=12

1-1+(     )=12

17+(     )-2=18

17-(     )+18=18

(     )-5+3=14

(     )+16-3=17

(     )+11-11=3

(     )-3+2=10

14-6+(     )=15

(     )-0+12=13

15+3-(     )=17

8-(     )+10=11

(     )-1+12=15

4+12-(     )=13

10-(     )+5=12

11-(     )+6=13

14+3-(     )=15

11+3-(     )=12

13-(     )+10=19

(     )-6+16=17

2+15-(     )=15

(     )+1-0=20

17+2-(     )=17

(     )+10-10=5

0+(     )-18=0