////////////////////////////////////////////////////////////////
//
//     http://www.planetquantum.com/Solve/Level1/Den13/Page52.txt
//
////////////////////////////////////////////////////////////////

Generator:
(C _E (Cos 1) 7 8 2)

Problem:
(= (cdot #[[27 18 28 18 28 45 90 45]
           [23 53 60 28 74 71 35 26]
           [62 49 77 57 24 70 93 69]
           [99 59 57 49 66 96 76 27]
           [72 40 76 63 3 53 54 75]
           [94 57 13 82 17 85 25 16]
           [64 27 42 74 66 39 19 32]]
         #[[x_1] [x_2] [x_3] [x_4] [x_5] [x_6] [x_7] [x_8]])
   #[[54] [3] [2] [30] [58] [68] [13]])

Solution:
(= #[[x_1] [x_2] [x_3] [x_4] [x_5] [x_6] [x_7] [x_8]]
   #[[12855935382]
     [73034397027]
     [-26454542283]
     [-15691415522]
     [10861507098]
     [-51564153478]
     [4622533052]
     [21370666548]])