From the merchant: Local mathematician specializing in Calculus, Trigonometry and Geometry with over 15 years experience.
The Fine Print
Promotional value expires 120 days after purchase. Amount paid never expires. Valid only within 20 miles of zip code 85250. Limit 2 per person, may buy 2 additional as gift(s). New customers only. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.