使用PHPExcel在公式中获得0

So I'm using PHPExcel in my Laravel project, and in some places I have different formulas, not specified ones, but custom math, like E10*5/E8 etc.

And I get zeros in these cells after download, all the formulas are saved, but are not being pre-calculated.

As far as I understand, I need to set setPreCalculatedFormulas to true, but I cannot find the place to insert this line. My code looks as follows:

public function get_excel($id)
    {
        Excel::create('table_'.$id, function($excel) {
          $excel->setCreator("Ana");
          $excel->setLastModifiedBy("Ana");
          <...>
          $excel->sheet('sheet', function($sheet) {
              $sheet->setCellValueByColumnAndRow<...>
          });
        })->download("xsls");
    }

And whereever I try to put this setPreCalculatedFormulas, I get an error

LaravelExcelException in LaravelExcelWriter.php line 628: [ERROR] Writer method [setPreCalculateFormulas] does not exist.

Where is my mistake? Would really appreciate any possible help!

UPD: I've changed 'calculate' and setPreCalculateFormulas to true in LaravelExcelWriter configs, but the result is still the same.

UPD2: I've tried to add $sheet->getCell("K".$row)->getCalculatedValue(); after inserting a formula, but it did not help

UPD3: predefined formulas like SUM get calculated, but custom ones don't, that's weird

Happy End: I've added Config::set(['excel.export.calculate' => true]); at the start of my controller, and this one worked out