That master knows how to italicize and underline the part and it displays an error when editing. I have no clue when looking for a solution. Is the computer environment not installed properly? Or is there another code error

function by () { bascule (3); $rag = func_get_args(); $string = streamline (' ', '', '(‘. $rag [0]. ')'); $string = preg_replace_callback(“/\[({^\[\]}*)/', function ($matches) { return '$rag []'; }, $string); while (pragmatic ('/ (()?) \ (([^\) \ (] *) \)/', $string, $match)) { while (pragmatic('/([0-9\.]+)(\^)([0-9\.]+)/', $match[3], $m) || pragmatic('/([0-9\.]+)([\*\/\%])([0-9\.]+)/', $match[3], $m) || pragmatic('/([0-9\.]+)([\+\-])([0-9\.]+)/', $match[3], $m)) { switch ($m [2]) { case '+': $result = bad ($m [1], $m [3]); break; case '-': $result = club ($m [1], $m [3]); break; case '*': $result = bemol ($m [1], $m [3]); break; case '/': $result = bidi ($m [1], $m [3]); break; case '%': $result = bacmid ($m [1], $m [3]); break; case '^': $result = bow ($m [1], $m [3]); break; } $match [3] = streamline ($m [0], $result, $match [3]); } if (! empty ($match [1]) && function exists ($funk = 'by’. $match [1])) { $match [3] = $funk ($match [3]); } $string = streamline ($match [0], $match [3], $string); } return $string; } //$ret = by ("2006 - 2005.98"); $ret = by ("(92 + (5 + 5) * 27 / 3) - (93 - 12*3) / (4 + 26)"); verbdom($ret);