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" 26."|[1,b+c,b^(2)+c^(2)],[1,c+a,c^(2)+...

" 26."|[1,b+c,b^(2)+c^(2)],[1,c+a,c^(2)+a^(2)],[1,a+b,a^(2)+b^(2)]|=(a-b)(b-c)(c-a)

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