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Category: Support FAQ Hands-On Equations

All of our products come with a 30-day money-back guarantee. Hence, you may order an individual or class set, try it out, and if you are not satisfied that it achieves for you the claims that we make for the product, return it with a short explanation and we will refund the purchase price, less the shipping and handling charge. If you have any special needs, please send your inquiry to [email protected]

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