User talk:211.22.180.226

November 2022
Hello, I'm Roundish. An edit that you recently made to Second partial derivative test seemed to be a test and has been reverted. If you want to practice editing, please use the sandbox. If you think a mistake was made, or if you have any questions, you can leave me a message on my talk page. Thanks! Roundish  ⋆  t c) 14:05, 20 November 2022 (UTC)