Solving the Youth Equation

"Brother, will Brother Lang really come?" Song Ziran pouted, "If you don't come, I will beat you, huh!" "I will come, I won't lie to you," Song Ziyuan looked helpless. … Embarrassed, he was surrounded by people before he entered the school gate. Xie Lang vowed, "Next time I will cover up and sneak in!" "I bet you can't do it." Big Head said firmly. "Just bet, and the loser will be treated to a seafood dinner!" Xie Lang was fearless. "Okay! Don't let me pay this time," Datou replied. "This... We have to name names today. I'll leave first. I'll gamble when I have time. Don't be afraid!" … "I ran so fast. I was really blocked by girls. I have the speed of an athlete," Big Head shook his head.