code: def get_text(prefix=""):
      if prefix:
          prefix = r"\text{" + prefix + r"}: "
      return r"$$" + prefix + r"\frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$$"
  
label_desc: Use image node_id 1 for calling a global function with example usage: get_text(prefix) and returns: unknown