September 2018 1 48 Report

(2\sqrt{2}-1)^{2}-(2\sqrt{2}-1)(1+2\sqrt{2})-(2\sqrt{2}+1)^{2}=\\ \\ (\sqrt{5}+\sqrt{5}-1)^{2}-(\sqrt{5}-\sqrt{5}-1)^{2}+(\sqrt{5}-1+\sqrt{5})(\sqrt{5}-\sqrt{5}-1)=

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