A white pen is laying on a sheet of graph paper with mathematical equations written in blue ink

A white pen is laying on a sheet of graph paper with mathematical equations written in blue ink. The paper is sitting on a wooden surface. The location is Kokhav Ya'ir Tzur Yigal, Israel at coordinates 32.219, 34.991. The pen is laying horizontally on the paper near the bottom right corner. There are no visible people in the scene. The environment is a typical study or work space. The equations are handwritten in blue ink on the graph paper. The pen is a basic white pen. The surface of the paper is smooth.