Combining 3 formula's in one cell

HI all,

Please could you help me I've got a spreadsheet with the following formulas that I want to implement:

=INT((TODAY()-E2)/7))
=IF(ISBLANK(E2),""
=IF (L2=”ARRIVED”, "",

Basically, I want the cell to calculate how many weeks between today and the date in cell E2. If cell E2 is blank, then I want the current cell to stay blank. ALSO, if cell L2 has the word "ARRIVED", then I want the cell to stay blank. How do I combine all 3 formula's into one cell?

Would really appreciate your help! THanks!