Can a PDF/Docs (with math equations) documents be imported into Mathematica
I think that the PDF's can only be imported as graphics. Look at the Import function in the Help, "Listing of Formats", and "Vector Graphics formats". I hope that this helps!
If you have an MS Word document with math equations created using MathType (version 6 or higher), then you can copy the formula from MathType and paste it into Mathematica Notebook. Note that such imported formula not necessarily represent a valid Mathematica formula.