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You may want to query the publisher of the Original Textbook and see if they want to issue your guide as an Official Supplement? I don't know what the subject is -- if it's something like Physic...
Answer
#4: Attribution notice removed
by
System
·
2020-02-10T14:22:53Z (over 4 years ago)
Source: https://writers.stackexchange.com/a/44828 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#3: Attribution notice added
by
System
·
2019-12-08T03:44:16Z (almost 5 years ago)
Source: https://writers.stackexchange.com/a/44828 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
You may want to query the publisher of the Original Textbook and see if they want to issue your guide as an Official Supplement? I don't know what the subject is -- if it's something like Physics where these equations are now "known facts", you may be fine doing these as your own work, but if you're doing something where the choice of equations is more up for debate, then I would consult the publisher of Main Textbook. Another route may be to link your supplement to a textbook that's more Public Domain, such as those in the [Open Textbook Project](https://open.umn.edu/opentextbooks/), or seek for some Creative Commons ones. (I am not a lawyer)
#1: Imported from external source
by
System
·
2019-04-29T13:52:58Z (over 5 years ago)
Original score: 1