From 65f85af242c5a23386595f5c2215e2981674c2c6 Mon Sep 17 00:00:00 2001
From: Zander Chase <130414180+vowelparrot@users.noreply.github.com>
Date: Wed, 10 May 2023 01:08:01 -0700
Subject: [PATCH] Improve math chain error msg (#4415)

---
 langchain/chains/llm_math/base.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/langchain/chains/llm_math/base.py b/langchain/chains/llm_math/base.py
index 1037658d60..b737b57f3f 100644
--- a/langchain/chains/llm_math/base.py
+++ b/langchain/chains/llm_math/base.py
@@ -84,7 +84,10 @@ class LLMMathChain(Chain):
                 )
             )
         except Exception as e:
-            raise ValueError(f"{e}. Please try again with a valid numerical expression")
+            raise ValueError(
+                f'LLMMathChain._evaluate("{expression}") raised error: {e}.'
+                " Please try again with a valid numerical expression"
+            )
 
         # Remove any leading and trailing brackets from the output
         return re.sub(r"^\[|\]$", "", output)