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
52+=54+5 8+9=12+ 34+=56-12
70-=30 +14>26
30+6>30+ -12<20