////////////////////////////////////////////////////////////////
//
//     http://www.planetquantum.com/Solve/Level1/Den13/Page64.txt
//
////////////////////////////////////////////////////////////////

Generator:
(C (^ _E 2) _Pi 6 7 4)

Problem:
(= (cdot #[[7389 560 9893 650 2272 3042 7460]
           [5750 781 3180 3155 7055 1847 3240]
           [8712 7822 5225 7379 6079 577 6338]
           [4312 4850 7912 1794 7737 5316 1265]
           [4788 6612 3884 6036 9278 1273 3744]
           [7839 2213 3980 7777 4900 1228 9560]]
         #[[x_1] [x_2] [x_3] [x_4] [x_5] [x_6] [x_7]])
   #[[3141] [5926] [5358] [9793] [2384] [6264]])

Solution:
(= #[[x_1] [x_2] [x_3] [x_4] [x_5] [x_6] [x_7]]
   #[[2731614529450539430637]
     [8671733272441473219160]
     [-13384952073806716526850]
     [-14898148422447334959239]
     [1860247134375928778081]
     [9430130626022109495298]
     [11279908592013671072310]])