The image shows a close-up of a document with text and some mathematical symbols. The document appears to be a page from a textbook or study material, possibly related to mathematics or science. The text is written in Vietnamese and includes mathematical equations and formulas. The document also contains a table with numerical data, which seems to be related to the mathematical content. The background of the document is white, and there are some colorful elements, such as a blue and yellow logo on the top left corner.