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(formal languages) Determine if the following statements are true or not: (a+b)*b(a+b)*=a*b(a+b) (a+ab+abc)* = a* +...

(formal languages)

Determine if the following statements are true or not:
(a+b)*b(a+b)*=a*b(a+b)
(a+ab+abc)* = a* + (ab)* + (abc)*
a*(a+b)*(a+b+c)*=a*(a*b*)*(a*b*c*)*

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