题目

David and I met as interns(实习生) on Capital Hill. Our love then grew through a 5-year long-distance relationship. We were able to survive despite our pursuit to become a doctor and a lawyer. He was at the University of Michigan School of Medicine and I was at the University of Maryland School of Law. We encouraged each other. David proposed to me on May 15, 2011 in front of both of our families. It was amazing! I graduated from law school on that day David proposed and we got married the day after he graduated from medical school.    David and I really didn’t have much money to 20、先化简，再求值：2x（3x2-4x+1）-3x2（2x-3）-1，其中x=-5．