I would say it's better to do the actual task and create a view instead of trying to get around the proper task. It's stupid to exercise and not do it properly.

FOR EVERONE WHO STRUGLE!

1. Understanding the task:
   You have to pick clients who spend more than 1,000 on products that belong to departments which sold more more than 10,000 worth of products. Sort the result by clients Id.
2. View problem:
   You have to comment the line where you create view, because you can't create view here by the algorithm still picking up the view key words

In js how this:
-2000+0.5x2^3', 5.5 => '-1916.81'
If I try to calculate all I'm getting is -1978. In order to get -1916.81 the x = 20.7975.