> A:=matrix(3,4,[10,3,5,4,3,1,1,7,-1,2,3,8]);

(create a 3 x 4 matrix. Numbers are one ROW at a time )

(use gauss jordan elimination to reduce A to final form, RREF)

(create square matrix )

(the above will multiply B by A, if they are compatible )

(compute the inverse of B, if it exists, and put it in C )

(raise B to 5th power and store in C1)