The image displays a white dry-erase board mounted on a light-colored wall, filled with engineering calculations and diagrams

The image displays a white dry-erase board mounted on a light-colored wall, filled with engineering calculations and diagrams. The board features a beam diagram illustrating forces, moments, and dimensions (e.g., 5kN forces, 2kN.m moment, 2m and 1m lengths), along with an x-z coordinate system. Below the beam diagram, corresponding shear force (Qz) and bending moment (My) diagrams are plotted, showing numerical values such as -5 and -8. A circular cross-section drawing with diameter 'd' is visible, alongside a specified stress value of 160 MPa. The right side of the board contains mathematical equations and text written in Bulgarian Cyrillic, including "Вътрешни усилия" (Internal forces) and calculations related to bending moments, such as My = 2.5(4-x)² - 5(4-x) - 8, with values determined for specific x-coordinates (x=2, x=4) yielding My = -8kN.m. The whiteboard shows signs of use, with some faint smudges. A wooden surface, possibly a desk or table, is partially visible in the bottom-left corner. No individuals are present in the scene. Based on the technical engineering content and the use of Bulgarian Cyrillic, the scene is located within an academic or professional engineering environment in Plovdiv, Bulgaria, most likely a university or technical college. A probable specific location is the **Technical University of Sofia - Branch Plovdiv**.