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Factorise : (b+c-a)(c+a-b)(a+b-c)+8abc...

Factorise : `(b+c-a)(c+a-b)(a+b-c)+8abc`

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The correct Answer is:
`(a+b+c)(2ab+2bc+2ca-a^(2)-b^(2)-c^(2))`
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