Curious thing is that, these Converters/Beautifiers are not able to transform Base to Exponent Power, which has to be like:
# Excel formula example:
// Here ;6 means Numerical Precision 6.
=Math.round( (Math.pow(1 + (P12/100), 1/P13) - 1) * 100000) /100000;
// Same formula in PHP:
=(round(pow(1 + (P12/100), 1/P13) - 1) * 100000) /100000;
The list bellow contains some of these as Beautifiers, Parsers or Analysers
Excel Formula Beautifier
Excel Formula Parsing
Calx calculate the value based on given formula, just like Excel does.
PHPExcel A pure PHP library for reading and writing spreadsheet files