How do i create this kind of matrix?

Given a scenario where the matrix is given as shown,

g=[X1 Y1; X2 Y2] and 
p=[Q1 P1; Q2 P2]

There is a need to produce a matrix that becomes

result=[X1-(X1-0+Q1) Y1-(Y1-0+P1); X2-(X2-Q1+Q2) Y2-(Y2-P1+P2)]

How do I get such matrix given that it has n x m rows and columns?

[dpb]

What does "it", specifically, refer to?

What does 0 refer to?

Presuming the sizes of the various submatrices are commensurate, what's to be done except write the end result?

[Derick Wong]

Means result=[X1-(X1+Q1) Y1-(Y1+P1); X2-(X2-Q1+Q2) Y2-(Y2-P1+P2)]

[dpb]

Say what????

Answer 1

[Image Analyst]

First of all, g is not involved in the result at all because it subtracts out. Then the result would be something like

 result = [p(1,:);diff(p)]