begin
Range(2, 7).Select(t -> (1 - t) / 2).Sum.Println;
end.
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Answers & Comments
PascalABC.NET 3.4.2, сборка 1837 от 11.10.2018
begin
Range(2, 7).Select(t -> (1 - t) / 2).Sum.Println;
end.