Question: Please answer all of them. Thank you. ! Exercise 3.4.2: Prove or disprove each of the following statements about regular expressions. b) (RSR) R R(SR+R)*

Please answer all of them. Thank you.

Please answer all of them. Thank you. ! Exercise 3.4.2: Prove or

! Exercise 3.4.2: Prove or disprove each of the following statements about regular expressions. b) (RSR) R R(SR+R)* c (RS +R)*RS(RR S). d) (R+S)*S= (RS)

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