2×55+5 3548+5 64-284×9 35-435+4
+38=40 -45=29 +26=83 72-=35
50-24=
22+18=
2×4+5=
15+13=
2×2+30=
3×3=
4×5=
9+(14-4)=
45+26+18= 74-18+22= 81-38-27=