Doug Walton@DougWaltonยทApr 29, 2017Glad @mathnancy_ is back. If you have to brush up on math from algebra to calculus, nobody explains it more clearly14
NancyPi@NancyPIReplying to @DougWaltonThank you, Doug!! ๐ I mean, Dr. Walton ๐4:50 PM ยท Apr 29, 2017ยทTwitter Web Client2 Likes