123456 = {24*[7073 / (3^2 + 1 + 1)] * 4*2} ---> 24__731_137_42, by again breaking the up the paired 1's, 3's, and 7's.
123456 = (1000000 - 876544) = [1000000 - (13712^2 - 13680^2)] = {1000000 - [(13700 + 2^4 - 4)^2 - [(13700 - 20)^2]} ---> 1 / 731__24_42__137 .
Each without the non-2^4 or outside exponents included .