////////////////////////////////////////////////////////////////
//
//     http://www.planetquantum.com/Solve/Level1/Den13/Page34.txt
//
////////////////////////////////////////////////////////////////

Generator:
(C (^ _E 1/2) _Pi 6 7 4)

Problem:
(= (cdot #[[1648 7212 7070 128 1468 4865 787]
           [8141 6357 1653 7761 71 148 115]
           [7507 9311 6406 6102 1194 2156 863]
           [2776 5200 5636 6643 28 6663 7756]
           [3077 9700 4671 1669 7521 9609 1598]
           [4097 1452 4900 5979 6929 4226 5909]]
         #[[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]]
   #[[7871629997603865470419]
     [-1369200063717830979023]
     [-1296868984971005665667]
     [-6926894887043149408806]
     [-1565051829913703555905]
     [1273550626145829825165]
     [3887424628821111342694]])