I have 100 on every assignment/test in my DE course. Today, I took one quiz out of many (of which 2 are dropped) on using Laplace transforms to solve equations. I have done dozens of these problems, with great success. Today, the quiz was 2 problems, both of which relied heavily on the fact that the Laplace transform of y is Y (clearly). For some reason, I saw the y and thought it was the dependent variable and put town the laplace transform for t.... I turned my quiz in, she looked at it, and then gave me this look like "really?", and then it hit me the second I walked out the door. How embarrassing. I mean, partial credit is given provided you sort of know what's up, and just make algebra errors or something, but this, well, if I looked over someones quiz with this mistake I would think they don't know what's going on with the transform, the major theory of this chapter. This is by far the worst mistake I have ever made on an assignment, and I absolutely KNOW the correct way to do it, I have no idea what I was thinking and I'm worried the professor will think I didn't understand the concepts or do the homework! Sorry for the rant, it's frustrating! This happened to any of you?