Complex sentence: The University of Utah study (with a population sample of 606 teens ages 14-18) stated that about one third of teens did not consider legal or other consequences when receiving or sending sexts.
Split into simpler sentences: The University of Utah conducted a study which contained a population sample of 606 teens who ranged from age 14-18. This study stated that about one third of teens did not consider or think of legal or other consequences of receiving or sending sexts.