Complex sentence: The community of Newbury Park, California is located in the western portion of the city of Thousand Oaks "and" Casa Conejo, an unincorporated area of southeastern of Ventura County's Conejo Valley, also the northwestern portion of the Greater Los Angeles Area.
Split into simpler sentences: The community of Newbury Park, California is located in the western portion of the city of Thousand Oaks "and" Casa Conejo, an unincorporated area of southern Ventura County. It is located in the East County area of Ventura County in the Conejo Valley, the northwestern portion of the Greater Los Angeles Area.