3rd Cache in a series of Tree Picture caches. Find the name of the Tree. Cache is not at the published location

Tree = ABCDE
Cache can be found at:
N51 20. (E-A-A) (C-D) (D+C)
E000 07. (E+(B/C)) (B+D) (E-B-A)
Cache is a black torpedo (Very spikey at GZ)