diff --git a/toolbox.py b/toolbox.py
index 2d98f88..f6cb609 100644
--- a/toolbox.py
+++ b/toolbox.py
@@ -1,21 +1,16 @@
 import markdown
 import importlib
-import time
 import inspect
-import re
 import gradio as gr
 import func_box
-import os
 from latex2mathml.converter import convert as tex2mathml
 from functools import wraps, lru_cache
-import logging
 import shutil
 import os
 import time
 import glob
 import sys
 from concurrent.futures import ThreadPoolExecutor
-import html
 ############################### 插件输入输出接驳区 #######################################
 
 """
@@ -297,7 +292,7 @@ def text_divide_paragraph(input_str):
     return input_str
 
 
-@lru_cache(maxsize=128) # 使用 lru缓存 加快转换速度
+@lru_cache(maxsize=128)  # 使用 lru缓存 加快转换速度
 def markdown_convertion(txt):
     """
     将Markdown格式的文本转换为HTML格式。如果包含数学公式，则先将公式转换为HTML格式。
@@ -306,14 +301,15 @@ def markdown_convertion(txt):
     suf = '</div>'
     if txt.startswith(pre) and txt.endswith(suf):
         # print('警告，输入了已经经过转化的字符串，二次转化可能出问题')
-        return txt # 已经被转化过，不需要再次转化
-    
+        return txt  # 已经被转化过，不需要再次转化
+
     markdown_extension_configs = {
         'mdx_math': {
             'enable_dollar_delimiter': True,
             'use_gitlab_delimiters': False,
         },
     }
+    find_equation_pattern = r'<script type="math/tex(?:.*?)>(.*?)</script>'
 
     def tex2mathml_catch_exception(content, *args, **kwargs):
         try:
@@ -346,22 +342,25 @@ def markdown_convertion(txt):
         """
         解决一个mdx_math的bug（单$包裹begin命令时多余<script>）
         """
-        content = content.replace('<script type="math/tex">\n<script type="math/tex; mode=display">', '<script type="math/tex; mode=display">')
+        content = content.replace('<script type="math/tex">\n<script type="math/tex; mode=display">',
+                                  '<script type="math/tex; mode=display">')
         content = content.replace('</script>\n</script>', '</script>')
         return content
 
     def no_code(txt):
-        if '```' not in txt: 
+        if '```' not in txt:
             return True
         else:
-            if '```reference' in txt: return True    # newbing
-            else: return False
+            if '```reference' in txt:
+                return True  # newbing
+            else:
+                return False
 
-    if ('$$' in txt) and no_code(txt):  # 有$标识的公式符号，且没有代码段```的标识
+    if ('$' in txt) and no_code(txt):  # 有$标识的公式符号，且没有代码段```的标识
         # convert everything to html format
         split = markdown.markdown(text='---')
-        find_equation_pattern = r'<script type="math/tex(?:.*?)>(.*?)</script>'
-        convert_stage_1 = markdown.markdown(text=txt, extensions=['mdx_math', 'fenced_code', 'tables', 'sane_lists'], extension_configs=markdown_extension_configs)
+        convert_stage_1 = markdown.markdown(text=txt, extensions=['mdx_math', 'fenced_code', 'tables', 'sane_lists'],
+                                            extension_configs=markdown_extension_configs)
         convert_stage_1 = markdown_bug_hunt(convert_stage_1)
         # re.DOTALL: Make the '.' special character match any character at all, including a newline; without this flag, '.' will match anything except a newline. Corresponds to the inline flag (?s).
         # 1. convert to easy-to-copy tex (do not render math)
@@ -371,8 +370,7 @@ def markdown_convertion(txt):
         # cat them together
         return pre + convert_stage_2_1 + f'{split}' + convert_stage_2_2 + suf
     else:
-        context = markdown.markdown(txt, extensions=['fenced_code', 'codehilite', 'tables', 'sane_lists'])
-        return pre + context + suf
+        return pre + markdown.markdown(txt, extensions=['fenced_code', 'codehilite', 'tables', 'sane_lists']) + suf
 
 
 def close_up_code_segment_during_stream(gpt_reply):