ok you have the hexacore.
first you install the driver in your pc
then run odin as administrator.click pda.then choose sm-n750 tar file in your pc.
turn on usb debugging in you note3 neo.then powerdown your phone.now boot youre phone in download mode.
by pressing volune down.home button and power.
now conect youre phone into pc then wait till a blue color appear in the small box in the upper left of odin saying id: com(dont know if i remember that corectly)if not.try another usb port.
if its blue then click start.utill you see succes.