Thank you so much for your interest in our products and for using our community.
Let me take a look into this, so please give me more time to reach you back with a proper answer.
On the other hand, I know that the equations are not developed in that document. But could you please explain in more detail the argument of your teacher? Perhaps with the use of parentheses it would help us not to fall into a misunderstanding. A reference would be helpful too.
Have a nice day!
