42-2= 76-6= 40+54= 56-6= 70+30-80=
35+4= 44+20= 65-60= 34-4= 15+30+4=
90+10= 88-30= 43+6= 20+56= 56-20-6=
45-40= 65-5= 82+7= 30+61= 36+2-30=
5665 40+774 50+88+50
10010 75-5075-5 >29>