up at 4am wake up at 7am

So i had lots of homework, more work than I thought and something came up over the weekend so I was busy. I know it's really bad of me but it's done, and whatever! 
I am only like halfway done. It's 4 am where I am and I have to wake up for class at 7am... should I stay up and work or go to sleep. I am extremely tired and barely able to function but if i don't finish I will get a zero. 

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