Oh NO!

I didn't pass my first Math exam in college. It's HORRIBLE!！！！！！！！

I was confident that I could at least get 80. I got all my homework right before the test. It's not about missing concepts that I've learned. When I check the mistakes, most of them are because of carelessness. It's actually even more frustrated to find the poor grade is the result of carelessness, not that I have missed some concepts or laws.
Well, consider it as a wake up college test. This is it.