Question 237084
The first row consists of 1 and 2
the second row is 3 and 4.
After that, there's a 1 by 2 matrix where row 1 
consists of x and row 2 consists of y and then it equals a 1 by 2 matrix.
 
then it equals a 1 by 2 matrix.
--------------------------------------------
1...2===x
3...4===y

00000000000000000
The 1st row of the 1 by 2 matrix would be 1*x+2*y
The 2nd row of the 1 by 2 matrix would be 3*x+4*y

0000000000000000000000

Cheers,
Stan H.