"Play" in the second sentence is used to describe doing something in a more casual way. Like for me, in video editing programs, I know how to use Premier Pro, but I've only played around with After Affects. "Played with" or "played around" means you've only learned a few things, but you don't know a whole lot about it.

This is a little hard to explain but I'll try. "The grammar exam is hard for me to pass." Using "for me" implies that it's too hard for specifically YOU to pass. "For me" basically says you're talking about yourself and only yourself. If you said "too me to pass" you'd be saying it's too hard to pass for anyone. It's more of a general observation "that's too hard" rather than a personal fact "that's too hard for me." Does that make sense?

Hello! Telling someone to "get on" would be proposing an action, like "get on the bike" or "get on this website." "Fall out" can mean two different things. it can be used to describe someone "falling out" of something, which is most common. (Example: "Don't fall out of the car.") But it's also slang for people getting into a fight and no longer speaking. Example: My friend and I got into an argument, and we're no longer friends. We had a fall out. "Catch up" is used to tell someone to hurry and get to the same place other people are. Example: You're racing with your friends to the car, and you're not as fast as everyone else. Your friend yells "catch up!" to encourage you to go faster. Another way it's used is to say you have things to tell someone about something that has happened. For example, I have a friend I don't see very often, so when we do get to see each other, we always have to "catch up" on what the other person has been doing. I hope this helps! Send me a message if you need to know more.

In this case, "in which" basically means "in the thing already mentioned". It already has said the subject is the earthquake, so it would be redundant to mention it again in the same sentence, so "in which" quickly references back to it.