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when toggle format what by license comment
Feb 18, 2021 at 21:42 comment added Will Sawin @MichaelStoll Indeed, thanks.
Feb 18, 2021 at 21:41 history edited Will Sawin CC BY-SA 4.0
edited body
Feb 18, 2021 at 21:12 vote accept Stanley Yao Xiao
Feb 18, 2021 at 20:53 comment added Michael Stoll I guess you mean $y_1y_2$ instead of $x_2y_2$?
Feb 18, 2021 at 19:57 history answered Will Sawin CC BY-SA 4.0