code: def test_no_methods_implicit_multiplication():
      # Issue 21020
      u = sympy.Symbol("u")
      transformations = standard_transformations + (
          implicit_multiplication,
      )
      expr = parse_expr(
          "x.is_polynomial(x)", transformations=transformations
      )
      assert expr == True
      expr = parse_expr(
          "(exp(x) / (1 + exp(2x))).subs(exp(x), u)",
          transformations=transformations,
      )
      assert expr == u / (u**2 + 1)
  
file_path: sympy/sympy/parsing/tests/test_implicit_multiplication_application.py
imports: import sympy
  from sympy.parsing.sympy_parser import parse_expr, standard_transformations, convert_xor, implicit_multiplication_application, implicit_multiplication, implicit_application, function_exponentiation, split_symbols, split_symbols_custom, _token_splittable
  from sympy.testing.pytest import raises
label_desc: Use image node_id 6 for calling a global function with example usage: test_no_methods_implicit_multiplication() without return types