26-7= 16-9= 54+10= 60+40=
3+67= 6+27= 13-7= 73-30=
40-9= 54+9= 76-60= 52+4=
26+50-8= 49-(12+6)= 6+6-8=
62-(17-8)= 52-8-30= 73-(49-40)=
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