Do the math Mystery Cache
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Difficulty:
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Terrain:
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Size: 
(small)
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Mystery in mathematic world. In this mystery you need to solve A,
B, C and D to get the coordinates.
A = GCD (221, 357)
B = LCM (221, 357)
For C and D you need this function.
f(x) = (x^2-2x+4)/(x-2)
C = maximum
D = minimum
Cache is located N 61° 28.xxx E 023° 45.yyy
xxx = A*D/2 + 3
yyy = B/A - C +35
Please, place the cache as it was when you found it! And be aware
of muggles. There may be many eyes watching you.
Check your answer
here!
Additional Hints
(Decrypt)
[MYSTERY:] cybg