Function: minus(noise(numbers("xyx") if noise(numbers("xyx")) > numbers("yyy") else numbers('xyy')) if noise(numbers("xyx")) > noise(numbers("xyx")) if numbers('xyy') > numbers("xyx") else numbers("yyy") else numbers("xyx"), noise(noise(numbers("xyx")) if numbers("xyx") > numbers('xyy') else numbers("yyy")))