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simplify factorise:- (a+b+c)whole square -(a-b-c)whole square +4b square +4c square

${(a + b + c)}^{2} - {(a - b - c)}^{2} + 4 b^{2} + 4 c^{2} a^{2} + b^{2} + c^{2} - {a^{2} + b^{2} + c^{2} - 2 a b + 2 a c - 2 c a} + 4 b^{2} + 4 c^{2} = a^{2} + b^{2} + c^{2} + 2 a b + 2 b c + 2 c a - a^{2} - b^{2} - c^{2} + 2 a b - 2 b c + 2 c a + 4 b^{2} + 4 c^{2} = 4 a b + 4 c a + 4 b^{2} + 4 c^{2} = 4 b (a + b) + 4 c (a + c) h e n c e, {(a + b + c)}^{2} - {(a - b - c)}^{2} + 4 b^{2} + 4 c^{2} = 4 b (a + b) + 4 c (a + c)$

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