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The task I want to accomplish is to cloud deploy a service connect to Twitter, post a Tweet, repeat that Tweet at regular interval, and then automatically terminate. For example: post Tweet "Have a nice day" with a picture of a blue sky, publish that...
There is no mathematical operation called plus/minus, the foundational axioms and theorems of algebra don't allow it.  The plus/minus as you describe it is a type set.  However, it is easy to operate with it, by setting up the equations seperaty as a...