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4+63= 68-7= 3+64= 67-4=
20+49= 55-40= 20+68= 55+2=
96-70= 20+60= 49-3= 88-60=
59-20= 2+55= 89-70= 46+20=
48-448-40 95-5085-50 89-898-8
87-4078-40 46+2046-20 9+6060+9
6+69= 31-7= 23-6= 50-5=
5+46= 51-4= 2+58= 15+7=
96-7= 28+6= 41-3= 88+6=
59-2= 7+18= 80-7= 46+8=
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