Update app.py

app.py

@@ -268,10 +268,10 @@ def convert_speech_to_math(text):
     """Convert natural language to math expressions"""
     if not text or text.strip() == "":
         return "0"
-
+    
     text = text.lower().strip()
-
-    # Enhanced pattern matching
+    
+    # Enhanced pattern matching with raw strings to avoid regex issues
     patterns = [
         (r'add\s+(\d+)\s+and\s+(\d+)', r'\1 + \2'),
         (r'what is\s+(\d+)\s+plus\s+(\d+)', r'\1 + \2'),
@@ -293,27 +293,39 @@ def convert_speech_to_math(text):
         (r'tangent of\s+(.+)', r'tan(\1)'),
         (r'derivative of\s+(.+)', r'diff(\1, x)'),
         (r'integral of\s+(.+)', r'integrate(\1, x)'),
-        (r'factorial of\s+(\d+)', r'factorial\((\d+)\)'), # Corrected pattern for factorial
+        (r'factorial of\s+(\d+)', r'factorial(\1)'),
     ]
-
+    
     for pattern, replacement in patterns:
-        text = re.sub(pattern, replacement, text)
-
-    # Word replacements
+        try:
+            text = re.sub(pattern, replacement, text)
+        except Exception as e:
+            print(f"Regex pattern failed: {pattern}, error: {e}")
+            continue
+    
+    # Word replacements (safe method)
     replacements = {
         'zero': '0', 'one': '1', 'two': '2', 'three': '3', 'four': '4',
         'five': '5', 'six': '6', 'seven': '7', 'eight': '8', 'nine': '9',
         'ten': '10', 'plus': '+', 'minus': '-', 'times': '*', 'multiplied by': '*',
-        'divided by': '/', 'over': '/', 'pi': 'pi', 'e': 'E', 'equals': '=='
+        'divided by': '/', 'over': '/', 'pi': 'pi', 'e': 'E'
     }
-
+    
     for word, replacement in replacements.items():
-        text = re.sub(r'\b' + word + r'\b', replacement, text)
-
-    # Clean up
-    text = re.sub(r'\s*([+\-*/^()])\s*', r'\1', text)
-    text = re.sub(r'(\d)([a-zA-Z(])', r'\1*\2', text) # Add multiplication sign if missing
-
+        text = text.replace(word, replacement)
+    
+    # Clean up spaces around operators (safe method)
+    operators = ['+', '-', '*', '/', '^', '(', ')']
+    for op in operators:
+        text = text.replace(f' {op} ', op).replace(f' {op}', op).replace(f'{op} ', op)
+    
+    # Add multiplication where implied (safe method)
+    text = text.replace(')(', ')*(')
+    
+    # Handle number followed by letter/variable
+    import re
+    text = re.sub(r'(\d)([a-zA-Z(])', r'\1*\2', text)
+    
     return text
 
 def evaluate_advanced_math(expression):