I immediately recognized this image to be from End of Evangelion.

+ means that of the prepending selection of characters (those in the []-brackets) at least one character has to Match.

The curly braces are some advanced Form of that and means for {n,m} anything between n and m characters of the prepending selection. In this Case it would be at least 2 as m isn’t given. This will Match any Domain ending With at least 2 characters.

Notice however that this is a very Basic regex pattern to Match Email addresses.

I actually still liked that a lot. The second season was hit or miss. There were some great episodes like that one about the natives backstory.

However it was made too hard to follow and I still don’t know exactly what’s going on all the time. I’m not the best to follow along with more complicated series, however I still enjoyed the ride.