In the video, a man is seen sitting at a desk with a piece of paper in front of him. He is writing a series of mathematical equations on the paper, using a blue pen. The equations are written in a neat and organized manner, with each equation separated by a line. The man appears to be focused on his work, occasionally pausing to think before continuing to write. The video provides a clear view of the equations, which are written in a clear and legible handwriting. The man's movements are deliberate and precise, indicating that he is experienced in writing mathematical equations. The video does not contain any other objects or people, and the background is mostly out of focus, drawing attention to the man's work.