Original sentence: Though it is considered one of the most powerful Russian Mafia gangs, Russian organized crime groups, is difficult for law enforcement to accurately measure the strength and influence of the family, since many racketeers declaring themselves 'solntsevskaya' only do so to be feared and respected, and are not actually affiliated with the organization, as well as frequent internal fighting
Edited sentence: Though it is considered one of the most powerful Russian organized crime groups, it is difficult for law enforcement to accurately measure the strength and influence of the family, since many racketeers declaring themselves 'solntsevskaya' only do so to be feared and respected, and are not actually affiliated with the organization, and there is also frequent internal fighting within the group