Lewis

Nearly there but not quite.
This is where it gets slightly complicated.
I am not just going to give it away!

You have to find 4 numbers, from the values that you have found so far.
Lets call them A, B, Y and Z.

A = D
B = E! + J + 2M
Y = H!/W + W
Z = LN - 500

Could not be easier.
I will tell you how you use the four values later.

Brahma