diff --git a/src/inference.py b/src/inference.py
index 99a2992..c0e263c 100644
--- a/src/inference.py
+++ b/src/inference.py
@@ -3,6 +3,7 @@ import argparse
 import cv2 as cv
 
 from pathlib import Path
+from utils import to_katex
 from models.ocr_model.utils.inference import inference as latex_inference
 from models.ocr_model.model.TexTeller import TexTeller
 from utils import load_det_tex_model, load_lang_models
@@ -44,7 +45,8 @@ if __name__ == '__main__':
     print('Inference...')
     if not args.mix:
         res = latex_inference(latex_rec_model, tokenizer, [img], args.cuda)
-        print(res[0])
+        res = to_katex(res[0])
+        print(res)
     else:
         # latex_det_model = load_det_tex_model()
         # lang_model      = load_lang_models()...
diff --git a/src/utils.py b/src/utils.py
index e6e4a9d..7822a76 100644
--- a/src/utils.py
+++ b/src/utils.py
@@ -1,8 +1,23 @@
 import numpy as np
+import re
 
 from models.ocr_model.utils.inference import inference as latex_inference
 
 
+def to_katex(formula: str) -> str:
+    res = formula
+    res = re.sub(r'\\mbox\{([^}]*)\}', r'\1', res)
+    res = re.sub(r'boldmath\$(.*?)\$', r'bm{\1}', res)
+    res = re.sub(r'\\\[(.*?)\\\]', r'\1\\newline', res) 
+
+    pattern = r'(\\(?:left|middle|right|big|Big|bigg|Bigg|bigl|Bigl|biggl|Biggl|bigm|Bigm|biggm|Biggm|bigr|Bigr|biggr|Biggr))\{([^}]*)\}'
+    replacement = r'\1\2'
+    res = re.sub(pattern, replacement, res)
+    if res.endswith(r'\newline'):
+        res = res[:-8]
+    return res
+
+
 def load_lang_models(language: str):
     ...
     # language: 'ch' or 'en'
diff --git a/src/web.py b/src/web.py
index 88a4381..9b53a59 100644
--- a/src/web.py
+++ b/src/web.py
@@ -4,11 +4,11 @@ import base64
 import tempfile
 import shutil
 import streamlit as st
-import re
 
 from PIL import Image
 from models.ocr_model.utils.inference import inference
 from models.ocr_model.model.TexTeller import TexTeller
+from utils import to_katex
 
 
 html_string = '''
@@ -66,19 +66,6 @@ def get_model():
 def get_tokenizer():
     return TexTeller.get_tokenizer(os.environ['TOKENIZER_DIR'])
 
-def to_katex(formula: str) -> str:
-    res = formula
-    res = re.sub(r'\\mbox\{([^}]*)\}', r'\1', res)
-    res = re.sub(r'boldmath\$(.*?)\$', r'bm{\1}', res)
-    res = re.sub(r'\\\[(.*?)\\\]', r'\1\\newline', res) 
-
-    pattern = r'(\\(?:left|middle|right|big|Big|bigg|Bigg|bigl|Bigl|biggl|Biggl|bigm|Bigm|biggm|Biggm|bigr|Bigr|biggr|Biggr))\{([^}]*)\}'
-    replacement = r'\1\2'
-    res = re.sub(pattern, replacement, res)
-    if res.endswith(r'\newline'):
-        res = res[:-8]
-    return res
-
 def get_image_base64(img_file):
     buffered = io.BytesIO()
     img_file.seek(0)