(a+B+c)cube-acube-bcube-c cube is equal to 3(a+B)(B+c)(c+a)
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(a+b+c)³-a³-b³-c³
=a³+b³+c³+3(a+b)(b+c)(c+a)-a³-b³-c³
=3(a+b)(b+c)(c+a)
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=a³+b³+c³+3(a+b)(b+c)(c+a)-a³-b³-c³
=3(a+b)(b+c)(c+a)
Plzz mark this as brainlist
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