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|{:(a,b,c),(a-b,b-c,c-a),(b+c,c+a,a+b):}...

`|{:(a,b,c),(a-b,b-c,c-a),(b+c,c+a,a+b):}|=a^3+b^3+c^3-3abc`

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`=a^3+b^3+c^3-3abc`
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