import java.util.regex.Pattern;
import java.util.regex.Matcher;

public class RearrangeText {
  public static void main(String args[]) {
    String regEx = "(Math.pow)"                                        // Math.pow
    + "\\s*\\(\\s*"                                                    // Opening (
    + "(([a-zA-Z_]\\w*)|([+|-]?(\\d+(\\.\\d*)?)|(\\.\\d+)))"           // First argument
    + "\\s*,\\s*"                                                      // Comma
    + "(([a-zA-Z_]\\w*)|([+|-]?(\\d+(\\.\\d*)?)|(\\.\\d+)))"           // Second argument
    + "\\s*\\)";                                                       // Closing )

    String oldCode =
                     "double result = Math.pow( 3.0, 16.0);\n" +
                     "double resultSquared = Math.pow(2 ,result );\n" +
                     "double hypotenuse = Math.sqrt(Math.pow(2.0, 30.0)+Math.pow(2 , 40.0));\n";
    Pattern pattern = Pattern.compile(regEx);
    Matcher m = pattern.matcher(oldCode);

    StringBuffer newCode = new StringBuffer();
    while(m.find()) {
      m.appendReplacement(newCode, "$1\\($8,$2\\)");
    }
    m.appendTail(newCode);

    System.out.println("Original Code:\n"+oldCode.toString());
    System.out.println("New Code:\n"+newCode.toString());
  }
}