code: def test_f2():
      assert limit(
          (sqrt(cos(x)) - root3(cos(x))) / (sin(x) ** 2), x, 0
      ) == -Rational(1, 12)
  
imports: from sympy.core.numbers import Rational, oo, pi
  from sympy.core.singleton import S
  from sympy.core.symbol import Symbol
  from sympy.functions.elementary.exponential import exp, log
  from sympy.functions.elementary.miscellaneous import root, sqrt
  from sympy.functions.elementary.trigonometric import asin, cos, sin, tan
  from sympy.polys.rationaltools import together
  from sympy.series.limits import limit
label_desc: Use image node_id 18 for calling a global function with example usage: test_f2() without return types