Complex sentence: From the age of 14, she took mathematics coursework at Harvard University and at the age of 16 graduated valedictorian of the Class of 1991 at Boston Latin School, an examination school and the oldest high school in the United States.
Split into simpler sentences: From the age of 14, Carlo took mathematics coursework at Harvard University. At the age of 16, she graduated valedictorian of the Class of 1991 at Boston Latin School, an examination school and the oldest high school in the United States.