person A: Hey_comma_ yesterday I forgot I had a test and spent the entire day worrying about it while trying to study. 
person B: Oh no! How did you end up doingf?
person A: I'm not too sure to be honest_comma_ I reviewed as much as I could_comma_ but I'm still worried about the results. 
person B: What subject was the test in?
person A: It was over linear algebra_comma_ which I've been having some trouble in.
person B: I am terrible at math