59+12= 94-26= 12+19= 90-54= 42-27=
64+26= 71-49= 53-17= 25+75= 36+47=
8+78= 83-29= 52-29= 73-16= 28+37=
53-35= 43-29= 83+17= 26+25= 16+60=
9×8-21 3+4×6 8×4+6 42÷7×6
60-9×4 2×(2+5) 72÷(3×3) (42-20)÷2
9×8+51 36+5×7