math for the USA

Legal Notes

This online service is provided and published by bettermarks GmbH, Berlin.

bettermarks GmbH
Skalitzer Straße 85-86
10997 Berlin

CEO: Arndt Kwiatkowski, Marianne Voigt
Registered Office: HRB 120966, Amtsgericht Charlottenburg
Address: Berlin, Germany
USt-IdNr. DE261509841


Phone: +49 30 300244000
Fax: +49 30 300244010

Contact person

Suggestions and feedback please contact: [email protected]
Technical notes, error messages, questions on service, etc. please contact: [email protected]
Person responsible for the editorial content: Christophe Speroni, [email protected]


The content of this website is carefully researched. Nevertheless, bettermarks GmbH assumes no responsibility that the information contained on these pages is up-to-date, accurate and complete. Note: bettermarks GmbH is not responsible for the content of external sites referred to in the context of this online offer and disclaims any liability for their content.

bettermarks GmbH assures that personal customer data is treated with utmost care and will not be passed on to third parties without consent. All rights reserved. Reproduction or modification in whole or in part without the written permission of bettermarks GmbH is prohibited.

© bettermarks GmbH