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Updated 28 Nov 2021

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Copyright © 2015Ė2024 by Stan Brown,

Iím glad you found this site useful. As you know, thereís no advertising on this site, but I still have to pay for storage, bandwidth, and Internet.

How much is that math help or calculator program worth to you? Please donate a few bucks to show your appreciation, keep this site advertising free, and support new content. Itís easy to do through PayPal. Just click the button below, and then PayPal will ask you to fill in an amount.

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No PayPal account? No problem! Use a credit card instead. PayPal will give you the choice to create an account to save the information, or not ó you decide. (See Buyers Can Checkout Without a PayPal Account.)

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