Complex sentence: He complains about his sudden demotion to Tony's driver and prepares to inject heroin between his toes (as to avoid noticeable tracks on his forearms) he offers Adriana to join him, but she declines.
Split into simpler sentences: He complains about his sudden demotion to Tony's driver and prepares to inject heroin between his toes (as to avoid noticeable tracks on his forearms). He offers Adriana to join him, but she declines.