I see a lot of students stretching and so on, so it is very confusing for me. How do we solve these equations?

Choose them if you like, but don' t confuse the nutrient composition.

If we confuse these three levels we will not think clearly.

THIS industrial city on the western edge of Lake Michigan has miles of shoreline, but no one would confuse it with East Hampton.

But don't confuse them with a simple stratus cloud clinging to a mountaintop. "Only a jaunty cloud hat" will do.