Известно, что [tex]a+b+c=2012[/tex],[tex]\frac{1}{a+b}+\frac{1}{b+c}+\frac{1}{a+c}=1 [/tex].Найти значение выражения [tex]\frac{c}{a+b}+\frac{a}{b+c}+\frac{b}{a+c} [/tex]

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