1.(l*m*n*)*=(lm*+mn*+nl*) *This entity is correct.As whatever is generated by LHS is also generated by RHS . for eg: m,l,n,mm,nn,mnletc.
2.(mn+m)*m=m(nm+m)* This entity is also correct. Strings are: m,mm,mnm... so on which are generated by both sides.
3.(l*m*n*)*=(l*+m*n+n*)* This is not correct . LHS is capable of generating m but not RHS . In RHS whenever any no of m would be generated we have to have m.
4.(l*m)*=(l+m)* This is also not correct. LHS cant produce only l..l has to be accompanied by m. If it would have been (l*m*)* it would have beeen correct.
