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Find a regular expression for the following regular languages (a) {w : 2na(w) + 3n6(w) is even } (b) {w : (na(w) nb(w)) mod 3

Find a regular expression for the following regular languages (a) {w : 2na(w) + 3n6(w) is even } (b) {w : (na(w) nb(w)) mod 3 = 1}

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