已知a>c>b,化简la+bl-la-bl+lb-cl+la+cl

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已知a>c>b,化简la+bl-la-bl+lb-cl+la+cl已知a>c>b,化简la+bl-la-bl+lb-cl+la+cl已知a>c>b,化简la+bl-la-bl+lb-cl+la+cla

已知a>c>b,化简la+bl-la-bl+lb-cl+la+cl
已知a>c>b,化简la+bl-la-bl+lb-cl+la+cl

已知a>c>b,化简la+bl-la-bl+lb-cl+la+cl
a+b-a-b+c-b+a+c
=2c-b+a