a+b+c=0 then find the value of abc÷(a+b)(b+c)(c+a)?
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abc÷(a+b)(b+c)(c+a)
=abc÷(abc+ac sequre+b sequre c+bc sequre+a sequreb+a sequre c+b sequre a+abc
=0
=abc÷(abc+ac sequre+b sequre c+bc sequre+a sequreb+a sequre c+b sequre a+abc
=0
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