You need a Codex to solve this puzzle, a book of new and old. There is NOT one currently hidden at the waypoint location, BUT depending when you search once may be available. It is also widely available in many other areas and online.
Where to find key #1
Using the table of contents to the correct codex ( need a hint? Look at the surroundings) apply the numbers provided in the equations below. Since A =43, you will need to determine what info they are converted from to get 43. Once this is solved, the rest of the equations will be simple. Substitute the correct numbers, solve the equations, get the correct coordinates, and solve the gadget cache to get the log.
Coordinates:
North : A B C
West: DE F G
All numbers in this formula are represented by Key 1 numbers.
A= 2+29 (Hint A=43)
B= 2-31
C= (19*8)+(23*37)+(26-8)+26+24-(32+64)
D= 32-39
E= 23+51
F= 2+49
G= (19*(63+64))+12
This far you have gotten is no easy feat so a hint I will give for what is at stake.
To open read from left to right, but to enter there is a twist. —-
Everything you need to gain access to the log and claim this find can be found in this cache.
Please do not remove items from this stage. There is no need to disassemble. Please do not.
Please return the cache gadgets to their starting position for the next seeker to find.
This cache has been placed with permission.
Please do not place spoiler pic of information in your logs. Thank you.