Function: cos(mod(2 *(minus(numbers("xyx"), numbers('ryy')) if numbers("xyx") > numbers('xyy') else numbers('ryy')), numbers("xyx") if minus(numbers("xyx"), numbers('ryy')) > numbers('xyy') else numbers('ryy')) if 2 *(numbers('ryy') if numbers('xyy') > numbers("xyx") else minus(numbers("xyx"), numbers('ryy'))) > minus(numbers("xyx"), numbers('ryy')) else numbers("xyx") if numbers('ryy') > numbers('xyy') else minus(numbers("xyx"), numbers('ryy')))