14-7= 8+40= 66+4= 11-3=
24+5= 54-30= 78-70= 57-9=
6+28= 20+57= 62-7= 48+8=
17-9= 70-8= 5+28= 12-5=
85-5= 16+50= 13-7= 90+3=
40+30= 90-40= 30+24= 80-4=
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