Correção de texto: Enem is coming

I am already in college, I'll make the ENEM anyway. ENEM is a really hard exam, even if you study a lot you'll find some difficulties to develop this exam, it's pretty extensive and we don't have much time to stop and thinking. Sometimes some questions looks like they goes by opinion from who's doing the exam, I mean, there is no the exact answer. Math is something that require a good memory and good notion of how to develop the questions. Chemistry isn't hard, Biology neither. Of course the subjects depends by the person, to me the more difficult is literature and math. The redaction require a good development of how we elaborate our opinion about something and how we organize it. The majority of the times it comes by luck, if the ENEM have questions related about we've been studied.