User talk:Andrewhales

December 2019
Hello, I'm David Tornheim. I noticed that you made a change to an article, Microsoft Mathematics, but you didn't provide a source. I’ve removed it for now, but if you’d like to include a citation to a reliable source and re-add it, please do so! If you think I made a mistake, or if you have any questions, you can leave me a message on my talk page. Thanks. --David Tornheim (talk) 06:13, 13 December 2019 (UTC)