To gain the bonus cache you will need to make some notes while doing my multi cache #5
The cache is not at the listed coordinates, but you will need to solve the following
How many Ms are there ? = A
How many Us are there ? = B
How many Ls are there ? = C
How many Ts are there ? = D
How many Is are there ? = E
The cache can be found at
N51 16. (D) (A + C)-1) (E + B)-2)
E000 09. (A * B) -D) (D + C) -E) (A / B) +D)