3+8= 10+4= 14-9= 13-8= 80-20+25=
28+60= 86-5= 17-7= 60-10= 6+53-20=
88-77= 68-50= 26+3= 50+8= 34-30+30=
48-6= 10+45= 47+3= 40-( )=20 30+( )=60
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