F=AB+A;C+B;C=AB+(A;+B;)C=AB+(AB);C=AB+C
F=(A+B;)(B+C;)(C+D;)(D+A;)
=A(B+C;)(C+D;)(D+A;)+B;(B+C;)(C+D;)(D+A;)
=(AB+AC;)(C+D;)(D+A;)+B;C;(C+D;)(D+A;)
=AB(C+D;)(D+A;)+B;C;(C+D;)(D+A;)
=ABC(D+A;)+B;C;D;(D+A;)
=ABCD+A;B;C;D
追问不好意思,我问的题目和你写的答案完全不同。我要的不是别的题,不过,还是感谢你的回复
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