Harry is my new classmate. He is now staying with his brother in Ha Noi, but he's in Bac Giang town and his parents still live there. Harry's brother's house is smaller than his house in Bac Giang, and it is on Xuan Thuy street. Our house is in the center of Ha Noi, so it is about 8 kilometers from his new house to school. Everyday Harry goes to school by bike. Minh is unhappy because he doesn't have many friends in Ha Noi. He also misses his parents and his friends in Bac Giang.

\(\frac{5.7.13}{26+5.13}=\frac{5.7.13}{2.13+5.13}=\frac{5.7.13}{\left(2+5\right).13}=\frac{5.7.13}{7.13}=5\)