////////////////////////////////////////////////////////////////
//
//     http://www.planetquantum.com/Solve/Level1/Den13/Page59.txt
//
////////////////////////////////////////////////////////////////

Generator:
(C (^ _E 2) _E 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]])
   #[[2718] [2818] [2845] [9045] [2353] [6028]])

Solution:
(= #[[x_1] [x_2] [x_3] [x_4] [x_5] [x_6] [x_7]]
   #[[3691072390121920996539]
     [11717610560099305454494]
     [-18086309949695147663069]
     [-20131004471225669083703]
     [2513644133339546306520]
     [12742388947519178372957]
     [15241886700410657589579]])