The Regular expressions Manipulation Engine

Term term1 = Term.regex("(abc|de|fg){2,}");
Term term2 = Term.regex("de.*");
Term term3 = Term.regex(".*abc");
                
Term term4 = Term.regex(".+(abc|de).+");
                
Term result = term1.intersection(term2, term3)
                   .subtraction(term4);
                
System.out.println(result);

regex=de(fg)*abc

const term1 = Term.regex("(abc|de|fg){2,}");
const term2 = Term.regex("de.*");
const term3 = Term.regex(".*abc");

const term4 = Term.regex(".+(abc|de).+");

term1.intersection(term2, term3)
    .then(result => result.subtraction(term4))
    .then(result => console.log(result.toString()));

regex=de(fg)*abc

term1 = Term.regex(r"(abc|de|fg){2,}")
term2 = Term.regex(r"de.*")
term3 = Term.regex(r".*abc")

term4 = Term.regex(r".+(abc|de).+")

result = term1.intersection(term2, term3)\
              .subtraction(term4)

print(result)

regex=de(fg)*abc