How to copy paste from client excel to online excel with formulas?

Working together with a group on a school assignment in my trade school class for logistics. We are copy-pasting our work to an online excel document, but I have noticed a problem in that my formulas don't follow allong, which will make it hard for the teacher to see how exactly I have calculated things. It just becomes plain text.

How do I solve this? My Excel is in Swedish, but I will try to translate the functions as good as I can. In the paste options I have the normal "paste"; which just brings along plain text. If I go inside "special paste", the "paste formulas" button is greyed out and I can't press it.

I'm using Excel 365 clientside.