Complex sentence: She represented Egypt in Miss Earth 2006, where she was among the eight finalists, in Miss Intercontinental 2005, where she was a semi-finalist, and Miss Universe 2005, where she didn't place at all.
Split into simpler sentences: She represented Egypt in Miss Universe 2005, Miss Intercontinental 2005 and Miss Earth 2006. In Miss Earth, she was among the eight finalists, in Miss Intercontinental, she was a semi-finalist, and in Miss Universe, she didn't place at all.