Ключевые слова: 3d, background, black, blackboard, board, brush, brushstroke, business, chalk, chalkboard, color, commerce, company, concept, corporate, deal, drawing, education, finance, gray, grunge, idea, join, knowladge, leadership, learn, learning, lesson, management, marketing, money, multicolor, overlapped, paint, paintbrush, partner, project, school, strategy, study, success, target, teach, team, text, texture, vintage, wall, word,