2 would be my pick out of those examples. The "to be" in 1 is redundant I think.
If I were creating a similar sentence I would use,
"Opening them before instructed is considered cheating."
Student or Learner
I see people use sentence like these:
1.Opening them before instructed will be considered to be cheating.(consiser+to V)
2.Opening them before instructed will be considered cheating(consider + Ving)
hey,is there any difference between the two sentences above ?are they all correct?