If you believe your copyright is being infringed by a user of the Desmos Services, please provide written notice to the following Desmos agent for notice of claims of copyright infringement.</p> Desmos, Inc. ATTN: Eli Luberoff, Copyright Agent 1488 Howard St. San Francisco, CA 94103 Email: info@desmos.com Telephone: (415) 636-8001 Fax: (415) 534-0941 <p>Your written notice must: (a) contain your physical or electronic signature.