////////////////////////////////////////////////////////////////
//
//     http://www.planetquantum.com/Solve/Level1/Den13/Page22.txt
//
////////////////////////////////////////////////////////////////

Generator:
(C (^ 5 1/2) (^ 3 1/3) 6 7 3)

Problem:
(= (cdot #[[223 606 797 749 978 969 640]
           [917 366 873 127 623 544 61]
           [835 961 152 572 427 89 724]
           [541 52 92 563 780 489 941]
           [441 440 837 878 227 496 950]
           [817 615 77 378 350 425 326]]
         #[[x_1] [x_2] [x_3] [x_4] [x_5] [x_6] [x_7]])
   #[[144] [224] [957] [30] [740] [838]])

Solution:
(= #[[x_1] [x_2] [x_3] [x_4] [x_5] [x_6] [x_7]]
   #[[-4619256357419797]
     [10404493647712383]
     [1385771705855449]
     [-35904804654206201]
     [-9869800319776572]
     [15613345675862361]
     [23494597510086597]])