Let r and s  be regular expressions. Which of the following regular expression equivalences is false?  Select one: (r+s)≡(s+r) (r∗s∗+s∗r∗)∗≡(r+r∗s)∗ (rs+sr)∗≡((r+s)(s+r))∗ (r+s)∗≡(r∗s∗)∗

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