code: def _simplify(expr):
      """Wrapper to avoid circular imports."""
      from sympy.simplify.simplify import simplify
  
      return simplify(expr)
  
file_path: sympy/sympy/matrices/utilities.py
imports: from contextlib import contextmanager
  from threading import local
  from sympy.core.function import expand_mul
label_desc: Use image node_id 7 for calling a global function with example usage: _simplify(expr) and returns: simplify