My solution:

The outer square lines in the third column/row is the result of the difference between what exists in the first two items in that row/column. Only outer lines appearing only once will be in the 3rd shape. The center lines seem to be only center lines that appear in both shapes. Therefore x is 52, since all outer shapes cancel and there are no shared center lines. The rest is fairly simple.

The second derivative of f(x) is 78x + 22, so the answer is 78(52) + 22 + 52 = 4130

I’m not completely confident in this solution but it seems to consistent will the known columns and rows.