78+456
a.568
b.537
c.534
534
6-4
a.6
b.2
2
124+65
a.189
b.136
c.99
189
60-1
a.52
b.59
59
99+1215
a.1324
b.1314
c.4216
1314
7-9
a.-2
b.0
-2
128695+537
a.129232
b.1453748
c.352684
129232
6-3
a.8
b.3
3