////////////////////////////////////////////////////////////////
//
//     http://www.planetquantum.com/Solve/Level1/Den13/Page2.txt
//
////////////////////////////////////////////////////////////////

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

Problem:
(= (cdot #[[14 42 24 95 70 30 74]
           [8 38 23 21 63 83 10]
           [78 1 9 58 83 91 86]
           [92 53 49 93 50 57 75]
           [46 41 61 94 54 16 87]
           [59 68 29 99 73 39 85]]
         #[[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]]
   #[[-8139860838]
     [6883247146]
     [-1884472180]
     [-5355700351]
     [-15940849726]
     [9647736714]
     [16287944820]])