According to Chegg's terms of service,
Moreover, according to Chegg, these terms apply "regardless of whether you are a registered user or a guest". It seems to me that this forbids:
a professor to discover answers to their questions on Chegg and alert a grading team to be alert for matching assignments.
a professor to introduce answers downloaded from Chegg as evidence at an academic integrity proceeding.
Does Chegg actually have the ability to forbid these actions?