Curtis played through the next level of a video game. at the beginning of the level, he had 71,486 points. the first time through the level, he lost a life and 3,960 points. as soon as he started the second time, curtis opened a treasure chest that doubled his score. by the end of the level, he increased his score by an additional 2,531 points. complete the expression for the number of points curtis had at the end of this level of the video game.