"Sum up at HAVO level with an image (is that correct?)"
Based on the vague request, an appropriate revised text for an AI image generator would be:
"Visualize an abstract mathematical concept at Dutch HAVO secondary education level on a chalkboard. The concept should include a mathematical equation, a diagram, and some handwritten notes explaining the phenomenon."
This statement would prompt an AI image generator to create a detailed and specific image pertaining to Dutch HAVO level mathematics education