Solving for xxx in the classroom

{
  "input": {
    "prompt": " Illustration of a British secondary school maths lesson where the blackboard or smartboard shows absurd algebra problems rewritten with “xxx” instead of “x.” A weary teacher points at an equation while baffled schoolchildren in uniform stare at worksheets covered in triple X symbols. Classroom details should include calculators, textbooks, pencil cases, and a poster about algebra. Tone should be deadpan and satirical rather than rude, making clear this is about mathematics and bureaucratic overreach, not adult content."
  }
}