Some engineering homeworks can easily take 4, 5, 6 hours each.
I have a good GPA and when it came time to do my senior project (you can't use chegg for that) my team and I completed a design, got it stamped by a professional engineer, and had constructed and installed for our customer.
This was evidence enough for me that I learned what I was meant to learn.
If it makes sense that they used one formula, or did a roundabout way to solve the problem, I repeat it. senior about to graduate, I used chegg through my entire degree program when I could.
If it doesn't make sense, I will find out why, either by looking online or asking someone. It is not cheating, it helped me understand a problem faster than getting frustrated and spending an extra three hours on a homework assignment.