I have a document containing notes from my past semester, which will not open properly. When i try to open up the document maple asks if i want to retrieve the content as plain text, 2D-math or maple input. The document is written in document mode and contains both text and 2D math. When I try to open it in plain text, maple gives me nothing, and with the two other options, maple is just loading forever. Can anybody help me retrieve the content og fix the document?

Noter_til_matematik_1.mw