code: def _mc_cormick(coord):
      """See https://www.sfu.ca/~ssurjano/mccorm.html."""
      x = coord[0]
      y = coord[1]
      return tf.sin(x + y) + tf.square(x - y) - 1.5 * x + 2.5 * y + 1
  
imports: import numpy
  import tensorflow.compat.v2
  import tf_quant_finance
  from tensorflow.python.framework import test_util
label_desc: Use image node_id 4 for calling a global function with example usage: _mc_cormick(coord) and returns: unknown