diff --git a/src/Plugin/Filter/MathjaxFilter.php b/src/Plugin/Filter/MathjaxFilter.php
index a123d4b..06a573d 100644
--- a/src/Plugin/Filter/MathjaxFilter.php
+++ b/src/Plugin/Filter/MathjaxFilter.php
@@ -2,6 +2,7 @@
 
 namespace Drupal\mathjax\Plugin\Filter;
 
+use Drupal\Component\Serialization\Json;
 use Drupal\filter\Plugin\FilterBase;
 use Drupal\filter\FilterProcessResult;
 use Drupal\Core\Url;
@@ -27,6 +28,11 @@ class MathjaxFilter extends FilterBase {
    * {@inheritdoc}
    */
   public function process($text, $langcode) {
+    // Do nothing if the text has no formulas.
+    if (!$this->hasMathFormulas($text)) {
+      return new FilterProcessResult($text);
+    }
+
     $wrapped = strip_tags($text) !== 'TEST' ? '<div class="tex2jax_process">' . $text . '</div>' : $text;
     $result = new FilterProcessResult($wrapped);
     $config = \Drupal::config('mathjax.settings');
@@ -49,6 +55,35 @@ class MathjaxFilter extends FilterBase {
     return $result;
   }
 
+  /**
+   * Returns a flag whether given text contains math formulas.
+   *
+   * @param string $text
+   *   The text to process.
+   *
+   * @return bool
+   *   Returns TRUE if the given text contains formulas. Otherwise, FALSE.
+   */
+  public function hasMathFormulas($text) {
+    $config = \Drupal::config('mathjax.settings');
+    $default_configuration = Json::decode($config->get('default_config_string'));
+    $delimiters = isset($default_configuration['tex2jax']['inlineMath']) ? $default_configuration['tex2jax']['inlineMath'] : [];
+    $default_delimiters = [['$$', '$$'], ['\[', '\]']];
+    $delimiters = array_merge($delimiters, $default_delimiters);
+
+    foreach ($delimiters as $delimiter) {
+      list($start, $end) = $delimiter;
+      if (mb_strpos($text, $start) !== FALSE) {
+        return TRUE;
+      }
+      elseif ($end != $start && mb_strpos($text, $end) !== FALSE) {
+        return TRUE;
+      }
+    }
+
+    return FALSE;
+  }
+
   /**
    * {@inheritdoc}
    */