The elements of a set consisting of -27 and twentyfive 1s.
ie -27*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1 = -27
and -27+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1 = -2
77
-16
-6
The numbers are 2 and -4
50
-25
22
They are: 3+2 = 5 and 3^2 = 9
2 and 10
+25 and -2
8 and 2
13