code: def test_expm1_cosm1_mixed():
      x = Symbol("x")
      expr1 = exp(x) + cos(x) - 2
      opt1 = optimize(expr1, [expm1_opt, cosm1_opt])
      assert opt1 == cosm1(x) + expm1(x)
  
imports: import tempfile
  from sympy.core.numbers import pi, Rational
  from sympy.core.power import Pow
  from sympy.core.singleton import S
  from sympy.core.symbol import Symbol
  from sympy.functions.elementary.complexes import Abs
  from sympy.functions.elementary.exponential import exp, log
  from sympy.functions.elementary.trigonometric import cos, sin, sinc
  from sympy.matrices.expressions.matexpr import MatrixSymbol
  from sympy.assumptions import assuming, Q
  from sympy.external import import_module
  from sympy.printing.codeprinter import ccode
  from sympy.codegen.matrix_nodes import MatrixSolve
  from sympy.codegen.cfunctions import log2, exp2, expm1, log1p
  from sympy.codegen.numpy_nodes import logaddexp, logaddexp2
  from sympy.codegen.scipy_nodes import cosm1, powm1
  from sympy.codegen.rewriting import optimize, cosm1_opt, log2_opt, exp2_opt, expm1_opt, log1p_opt, powm1_opt, optims_c99, create_expand_pow_optimization, matinv_opt, logaddexp_opt, logaddexp2_opt, optims_numpy, optims_scipy, sinc_opts, FuncMinusOneOptim
  from sympy.testing.pytest import XFAIL, skip
  from sympy.utilities import lambdify
  from sympy.utilities._compilation import compile_link_import_strings, has_c
  from sympy.utilities._compilation.util import may_xfail
label_desc: Use image node_id 7 for calling a global function with example usage: test_expm1_cosm1_mixed() without return types