Ключевые слова: 3d, 3d composite, 3d generated image, advertisement, alphabet, arrow symbol, background, backgrounds, blackboard, blank, brown, chalkboard, circle, communication, complicated, composite image, computer graphic, connection, copy space, diagram, difficult, digital, digital composite, digital generated, digital generated image, education, empty, equation, fence, formula, fraction, full frame, function, geometry, graphic, gray background, hand, holding, illustration, integral, material, math, mathematical symbol, mathematics, nature, part of, physics, shape, showing, symbol, text, texture, theory, vignette, white, white color, woman, wood, wooden,