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Prove: |[1,a^2+bc, a^3],[ 1,b^2+c a, b^3...

Prove: `|[1,a^2+bc, a^3],[ 1,b^2+c a, b^3],[ 1,c^2+a b, c^3]|=-(a-b)(b-c)(c-a)(a^2+b^2+c^2)`

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