fix math cornercase

utils.py

@@ -33,12 +33,12 @@ def sync_pipe(func, progress=False):
     return sync_func
 
 
-def return_blank_if_exception(func):
-    def wrapper(*args, **kwargs):
+def asis_backup(func):
+    def wrapper(sample):
         try:
-            return func(*args, **kwargs)
+            return func(sample)
         except Exception:
-            return ""
+            return sample
 
     return wrapper
 
@@ -136,17 +136,20 @@ def extract_numeric(string, pattern=NUMERIC_IN_EN) -> str:
 
 
 def remove_boxed(s):
-    if (left := "\\boxed ") in s:
-        assert s[: len(left)] == left, s
-        return s[len(left) :]
-    elif (left := "\\boxed{") in s:
-        assert s[: len(left)] == left, s
-        return s[len(left) : -1]
-
-    elif (left := "\\fbox{") in s:
-        assert s[: len(left)] == left, s
-        return s[len(left) : -1]
-    raise ValueError(f"Cannot remove boxed from {s}")
+    try:
+        if (left := "\\boxed ") in s:
+            assert s[: len(left)] == left, s
+            return s[len(left) :]
+        elif (left := "\\boxed{") in s:
+            assert s[: len(left)] == left, s
+            return s[len(left) : -1]
+
+        elif (left := "\\fbox{") in s:
+            assert s[: len(left)] == left, s
+            return s[len(left) : -1]
+        raise ValueError(f"Cannot remove boxed from {s}")
+    except AssertionError:
+        return s
 
 
 def last_boxed_only_string(string):
@@ -179,6 +182,7 @@ def last_boxed_only_string(string):
     return retval
 
 
+@asis_backup
 def get_answer(string):
     if boxed := last_boxed_only_string(string):
         return remove_boxed(boxed)