code: def d(x, P=P, L=L, E=E):
      return 4 * P * L**3 / (E * x[3] * x[2] ** 3)
  
file_path: mystic/examples2/beam.py
imports: from mystic.penalty import quadratic_inequality
label_desc: Use image node_id 10 for calling a global function with example usage: d(x, P, L, E) and returns: unknown