Your mother needs a serious operation - and the attending surgeon paid someone to write his biology papers...
The water supply is tainted with deadly bacteria - because the environmental engineer only passed chemistry by copying his friend's work...
Your boss calls you into her office to explain why you took a "shortcut" that will cost the company thousands of dollars...
Your application to teacher's college or grad school is unilaterally refused as you have a notation on your transcript...
You are fired from your dream job when the Human Resources department digs further into your academic history...
It isn't worth the risk.
If you are an international student, it is especially important that you learn what is expected from you at the University of Waterloo. The International Student Office is available to answer any questions you may have. In particular, the handbook "Destination Waterloo" provides guidance, as does the student guidebook "Student Life 101 (PDF)", regarding issues of Academic Integrity, group work, and expectations.
Working in study groups or teams can be beneficial, but you need to be very careful of limitations and expectations. Check the course syllabus carefully to determine if group work is acceptable and the level of collaboration allowed, whether in person or online as both are considered equal. If you are required to do all work independently, you must do just that - sharing answers or dividing the work among team members is considered cheating.
If you do work with others without explicit authorization from your professor, you run the risk of collusion and may face academic penalty.