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Show that |{:( 2bc-a^2 , c^2 ,b^2),(c^2 ...

Show that `|{:( 2bc-a^2 , c^2 ,b^2),(c^2 , 2ca-b^2 , a^2),(b^2 , a^2 , 2ab-c^2):}| = |{:(a,b,c),(b,c,a),(c,a,b):}|^2`

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