Is there a more efficient way to add these matrices?

Which operator can I use in the equations for D, E, and F that can evaluate them the same way, except more efficient than how I have it shown (i.e. takes up less space on the page than both Methods)? (Yes, it took a long time to type them out. No, I'm not proud of my work 😅).

I know I can simply define A, B, and C with more elements like I've shown in Method 2 to make D and E cleaner. But that still leaves the same expression for F in both Methods. The order of the elements in matrices D, E, or F isn't important for my application of this (it's for wind loading on roof parapets).

Thank you in advance, and my apologies if this question has already been asked, or if it's excessively elementary! My grasp of matrices/vectors has always been poor, so I didn't even know what to search for. I tried a few key words, but alas, here we are.

I'm using Prime 7.0 if that's important.