code: def MGH10(b, x, y=0):
      b = read_params(b)
      model = b[0] * exp(b[1] / (x + b[2]))
      return model - y
  
imports: import os
  from numpy import arctan, array, cos, exp, log, sin
  from lmfit import Parameters
label_desc: Use image node_id 13 for calling a global function with example usage: MGH10(b, x, y) and returns: unknown