Question: Which of this regular expression doesn't show a language with finite set of strings? 1) xyz 2) (xy)+z 3)(x+y)+(x+y) 4) x+(y+z) 5)x+yz*

Which of this regular expression doesn't show a language with finite set of strings?

1) xyz

2) (xy)+z

3)(x+y)+(x+y)

4) x+(y+z)

5)x+yz*

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