A 0
A 1
A 2
A 10
A 11
A 12
A = 
[[0,1,2]
 [10,11,12]]
Ac = 
[[0,1,2]
 [10,11,12]]
----------
Expr = 
[[0,2,4]
 [20,22,24]]
----------
A F->C = 
[[0,1,2]
 [10,11,12]]
----------
A C->C = 
[[0,1,2]
 [10,11,12]]
----------
Ac = 
[[287,1,2]
 [10,11,12]]
----------
A = 
[[287,1,2]
 [10,11,12]]
----------
A = 
[[287,1,2]
 [10,11,12]]
A(range(0,1),range(1,2) ) = 
[[1]]
A = 
[[287,300,2]
 [10,11,12]]
Ac = 
[[287,300,2]
 [10,11,12]]
A = 
[[287,156,2]
 [10,11,12]]
Ac = 
[[287,300,2]
 [10,11,12]]