-8+9=
3*x+7*y+1*z=307
4*x+10*y+1*z=411
define overlapping set
5011207233.4748
6529668.5037
6226342.1974
7011
3063
1275601010074
3948
14022
6126
.1054
9598
1216
7865982
1070473.916...
110÷3600×36
.6.25÷0.5
find a sum 67 plus 89
30 divided by 27
[(x+y)-z]^2