In the video, a person is writing on a piece of paper with a black pen. The person is writing a mathematical equation that involves the number 9. The person's hand is visible in the frame, and they are holding the pen with their right hand. The paper appears to be a standard lined notebook paper. The person's writing is neat and legible, and they seem to be focused on the task at hand. The video does not provide any additional context or information about the person or the location where the video was recorded.