ruby0.49, 227 bytes

Result

WA

Duration

475ms

Code [DL]

x=[[1,2,3],[1,2,3],[1,2,3],[1,2,3]]
a=x[1][0] - x[0][0]
b=x[1][1] - x[0][1]
c=x[1][2] - x[0][2]
d=x[2][0] - x[0][0]
e=x[2][1] - x[0][1]
f=x[2][2] - x[0][2]
g=x[3][0] - x[0][0]
h=x[3][1] - x[0][1]
i=x[3][2] - x[0][2]
print (z)

stdin

26 89 15
21 55 17
63 03 35
09 89 95

stdout

nil

stderr

strace