Question: Can you give me some step-by-step instructions for this math problem: Jasmine's teacher gives stickers for reward. She was given 15 stickers for participating in class, but she lost 7 stickers during playtime. However, her teacher gave her another 5 stickers for helping her classmates. How many stickers does she have at the end?
Answer: 
Jasmine had 15 stickers - 7 stickers = 8 stickers after losing 7.
Then, she now has 8 stickers + 5 stickers = 13 stickers at the end.