You know what pisses me off sometimes? When people make explanations really complicated for no explicable reason. Seriously, I looked up "how to find the amount of atoms in a chemical formula", and I found a long, drawn-out result that didn't help me understand it at all, and then a much simpler version of the same thing, that helped me a hell of a lot more. Seriously, you don't need to have big words and long paragraphs to get your point across, just shorten it to a simple understandable paragraph, and boom you have an easily understood explanation. Just as an add-on story, my brother's professors in college would actually TAKE OFF points if you made your essays too long, and said to keep them short and sweet, which I completely agree with. Fluff does not equal better.