////////////////////////////////////////////////////////////////
//
//     http://www.planetquantum.com/Solve/Level1/Den13/Page14.txt
//
////////////////////////////////////////////////////////////////

Generator:
(C (^ 2 1/3) (Tan 1) 6 7 2)

Problem:
(= (cdot #[[12 59 92 10 49 89 48]
           [73 16 47 67 21 6 7]
           [27 82 28 35 5 70 25]
           [14 64 70 15 7 98 0]
           [81 97 51 12 15 52 99]
           [67 65 13 95 94 83 72]]
         #[[x_1] [x_2] [x_3] [x_4] [x_5] [x_6] [x_7]])
   #[[15] [57] [40] [77] [24] [65]])

Solution:
(= #[[x_1] [x_2] [x_3] [x_4] [x_5] [x_6] [x_7]]
   #[[-35726393328]
     [-81432948738]
     [10045299589]
     [68155692543]
     [-95642696504]
     [47508885123]
     [85119532513]])