Magic number: 3

Just 3 days of school left. Then it's spring break... finally.
But there is still a 2 hours math-test on wednesday. 
I am actually not sure, if I can handle that, 'cause I am such a looser when it's about math.
There are just confusing numbers and signs I see written on the pages.
But I am studying so much for it, well, 2 days. So I hope it's gonna work.

Exponential functions, logarithm functions, computation of interests.
I really don't get all that.

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