Can't believe I failed that test.
Oh no, I'm sorry to hear that. What kind of test was it?
It was calculus, very hard stuff for me.
Calculus seems like very hard stuff for anyone. Don't feel too down. Just use this as motivation to study more!
It's quite hard but I plan to really tackle the next test and ace it.
That's the spirit! Never quit and give up. Everyone fails sometimes.