Conceptual inscription about business on wallpaperConceptual inscription about business on wallpaper
A huge number of mathematical formulas on a gray background with a light centerA huge number of mathematical formulas on a gray background with a light center
Windows 7. stylized illustration with the number sevenWindows 7. Stylized illustration with the number seven
Сведения, необходимые для какого-н. вывода, решения. Основания для чего-н., качества.