Carola Mystery Cache
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Difficulty:
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Terrain:
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Size: 
(regular)
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Which one is Carola?
New start coordinates: N 55° 43.067 E 013° 13.716
You should get a name with 4 characters (ABCD).
Convert all letters among ABCD to digits (a=1, b=2, ...)
Use 8*A*A+2*(2+C)-(A-4-D)*B as trailing digits for north coordinates.
Use (A-1)*B*(B-4)+5*C*C-3*(D+6) as trailing digits for east coordinates.
The start coordinates were moved 2014-04-29 and the formulas were updated. The actual hide is on the same location as before. Indeed this mystery is harder now compared to when it was created...
Additional Hints
(Decrypt)
[First location] Ybbx gb A svefg naq gura gb F
[Problem] Svefg zna jnyxvat
[Cache location] Va gur cvcr