25212

My solution is that you don't even need to work out the shapes, and that the ? is 28. This because the vertical lines that sum up to 23 and ? are the same apart from one has a triangle and one has a square. I figured as lines 18 and 20 (which sum to) are like this also, the sums are two away from each other which gives away that the sqaure is obviously two more than a triangle.