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2+21=23
2*21=42
(* is another symbol for multiply)
-19
-1
7.5516 and 70.4484 (approx)
49
23
The numbers are: -25 and -30
15.268 and 18.732
4
The numbers are 10 and 5.2
-9+4
2.4115 and 33.5885 (to 4 dp)
8, 5 and 2
The numbers are: 30 and -30