Original sentence: A prodigy, he attended Princeton University at the age of 13 after graduating from high school at the same time as his brother who is five years his senior,("Soft Target") and took Professor Lawrence Fleinhardt's quantum physics course in his first year
Edited sentence: A prodigy, he attended Princeton University at the age of 13 after graduating from high school at the same time as his brother who is five years his senior ("Soft Target"), and took Professor Lawrence Fleinhardt's quantum physics course in his first year