If you all agree with the solution, where we should alert when the string output from both machines are not identical, let me know. is "where" miss placed there? should i use "when" twice?

Maybe just change it to

If you all agree with the solution, we should alert when the string output from both machines are not identical, let me know.

I agree that you should change it to when but it also makes sense with where out of the sentence :)

1. she did not cheat on the test, for it was the wrong thing to do.2. i am counting my calories, yet i really want desert.3. i really need to go to work, but i am too sick to drive. there 3 examples of a compound sentence good luck