Ключевые слова: achievement, answers, award, background, badge, celebration, check, circle, concept, contour, design, document, drawing, education, exam, f, form, glowing, icon, illustration, incorrect, isolated, lamp, light, line, linear, list, mark, math, mathematics, mistakes, neon, office, outline, paper, questionnaire, school, science, set, sign, star, success, symbol, trigonometric, winner,