Ключевые слова: abstract, alphabet, amount, ancient, art, background, business, button, clip, contour, design, education, element, famous, flat, font, formula, gold, golden, graphic, greece, greek, icon, illustration, isolated, knowledge, latin, letter, line, linear, lineart, logo, math, mathematical, mathematics, outline, pictogram, school, science, shape, sigma, sign, study, style, symbol, typography, value, web, website,