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If|((b+c)^2,a^2,a^2),(b^2,(c+a)^2,b^2),(...

If`|((b+c)^2,a^2,a^2),(b^2,(c+a)^2,b^2),(c^2,c^2,(a+b)^2)|=kabc(a+b+c)^3` then the value of k is

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