What an idiot. The domain of f is obviously [-2, 4).
This kid is so dumb, he put his laptop in the freezer and FORGOT it was in there! What an idiot!
In addition to the spelling, note how he capitalizes every word, as if it's the name of a book.
"Y? Oh my god what an idiot. It's spelled "W-H-Y" you stupid idiot."
Oh man, does that kid look like an idiot! Adidas tracksuit? What is this, Dude Where's My Car 2?
The true mark of an idiot: The Self Shaming