The next step: To request registration, click the "Place your request now" button. Once MoMath has processed your registration and has scheduled your trip on one of the dates you indicated, you will receive an invoice by email. There may be a rescheduling fee if you request a date change after that point. Payment is due no later than 30 days before the date of your trip. Please be as accurate as possible in booking your trip since MoMath is not able to provide refunds.