Sadly you can not root the latest update as of yet, but it will come, I've been trying everything I can think of. Just be patient.
If you saw the last post in hashcodes's thread, they just rooted 11.3.3.2 on hd 2013... I'm sure 13.3.3.2 for hdx 7 and 14.3.3.2 for hdx 8.9 isn't that much different.
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