1. Let's start by understanding what a subject is in the context of academics. A subject is a branch of knowledge or study, such as mathematics, physics, chemistry, or history. 2. Since you asked to teach you the topic of the subject of, it seems you want an introduction to a specific subject. Please specify which subject you want to learn about, for example, algebra, calculus, or physics. 3. Once you specify the subject, I can provide detailed explanations, formulas, and examples to help you understand the topic thoroughly. Please provide the subject name so I can assist you better.