Complex sentence: Whitman earned high scores on the required examination, and the selection committee approved his enrollment at a preparatory school in Maryland, where he successfully completed courses in mathematics and physics before being approved to transfer to the University of Texas at Austin to study mechanical engineering.
Split into simpler sentences: Whitman earned high scores on the required examination, and the selection committee approved his enrollment at a preparatory school in Maryland. Whitman successfully completed courses in mathematics and physics before being approved to transfer to the University of Texas at Austin to study mechanical engineering.