'määritelmä'
"<div style=\"\n"
+"margin-left: 40px;\n"
+"border: 3px solid sandybrown;\n"
+"padding:8px;\n"
+"max-width: max-content;\n"
+"border-radius: 15px;\n"
+"background-image: linear-gradient(to right, whitesmoke, whitesmoke, sandybrown);\">\n"
+"<b>Määritelmä. <\/b> Funktio \\(f:\\mathbb{R}\^{2}\\to \\mathbb{R}\\) on\n"
+"<element style=\"color:blue;font-style:italic;\">differentioituva<\/element>, jos...\n"
+"<\/div><br>\n";