In Spanish, commands are part of the Spanish Imperative Mood. We use this mood to tell someone to do something in a direct manner. In this way, usted commands is often used when addressing a person you want to show respect. Maybe this person is older than you or is your teacher, father, grandfather, boss, etc. Therefore, by writing thee commands (mandatos) we have:
1. Corríjame la tarea, por favor (Correct my homework, please)
The verb of this exercise is corregir. Its conjugation that implies a formal usted command is corríjame. So, you are addressing your teacher to do something, that is, correct your homework.
2. Deme dinero para ir a la escuela esta semana, por favor (Give me some money to go to school this week, please)
The verb of this exercise is dar. Its conjugation that implies a formal usted command is deme. Thus, you are addressing your father to give you some money.
3. Lléveme a casa de mi amigo Juan, por favor (Take me to my friend Juan's house, please)
The verb of this exercise is llevar. Its conjugation that implies a formal usted command is lléveme. Therefore, you are addressing your father to take you to your friend's house.