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4 Regular Expressions Write a regular expression for the following languages. (a) All strings of a's, b's, and c's that contain no a's following any

4 Regular Expressions Write a regular expression for the following languages. (a) All strings of a's, b's, and c's that contain no a's following any b's. (b) All strings of a's, b's, and c's that do not contain more than 2 a and 2 b's

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