72-31+8=
72-31+8=49
35-28+28=
35-28+28=35
87-76+22=
87-76+22=33
36+34-14=
36+34-14=56
2×4+3=
3×5+3=
3×3-3=
4×3+4=
4×2+4=
3×2-4=
5×5-5=