Update app.py

app.py

@@ -517,7 +517,8 @@ def extract_and_run_sympy_code_simple(response_text):
         # Set up basic SymPy environment
         import io
         import sympy
-        from  sympy import (Symbol, symbols, solve, limit, Abs, integrate,
+        from contextlib import redirect_stdout
+        from sympy import (Symbol, symbols, solve, limit, Abs, integrate,
                          Function, diff, sin, cos, exp, log, sqrt,
                          Matrix, Derivative, Integral, series)