72-8= 5×9= 36-9= 57+9= 30+70=
76-40= 8×4= 7×5= 70-7= 35+8=
9+44= 5×4= 9×6= 24-7= 3×8=
8×0= 7×8-20= 4×9+4= 32-20+50= 7-3×2=