code: def math_role(
      role, rawtext, text, lineno, inliner, options={}, content=[]
  ):
      i = rawtext.find("`")
      latex = rawtext[i + 1 : -1]
      node = latex_math(rawtext)
      node["latex"] = latex
      node["fontset"] = options.get("fontset", "cm")
      node["fontsize"] = options.get(
          "fontsize", setup.app.config.mathmpl_fontsize
      )
      return [node], []
  
imports: import hashlib
  from pathlib import Path
  from docutils import nodes
  from docutils.parsers.rst import Directive, directives
  import sphinx
  from sphinx.errors import ConfigError, ExtensionError
  import matplotlib
  from matplotlib import _api, mathtext
  from matplotlib.rcsetup import validate_float_or_None
label_desc: Use image node_id 2 for calling a global function with example usage: math_role(role, rawtext, text, lineno, inliner, options, content) and returns: list,  list