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Let A={a, b, c}. Find a regular expression r such that L(r) consists of all words w where: 2.13. Let wL(r) and w=x1x2xn. If xk=c

Let A={a, b, c}. Find a regular expression r such that L(r) consists of all words w where:

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2.13. Let wL(r) and w=x1x2xn. If xk=c then there exists an index m

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