Java tutorial
//package com.java2s; import org.json.JSONException; import org.json.JSONObject; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Main { public static String getContentMathML(String latexMLResponse) { String CML_REGEX = "<annotation-xml.*MWS-Query\">(.*)<.annotation-xml>"; Pattern pattern = Pattern.compile(CML_REGEX, Pattern.DOTALL); try { JSONObject latexMLJSON = new JSONObject(latexMLResponse); String math = latexMLJSON.getString("result"); Matcher matcher = pattern.matcher(math); if (matcher.find()) { return matcher.group(1); } } catch (JSONException e) { e.printStackTrace(); } return null; } }