code: def multivariate_quadratic(p, x, y):
      """Multivariate quadratic function."""
      a = tf.expand_dims(p[..., 0], axis=-1)
      b = tf.expand_dims(p[..., 1], axis=-1)
      c = tf.expand_dims(p[..., 2], axis=-1)
      d = tf.expand_dims(p[..., 3], axis=-1)
      return a * x**2 + b * x * y + c * y**2 + d
  
file_path: tf-quant-finance/tf_quant_finance/math/jacobian_test.py
imports: import functools
  from absl.testing import parameterized
  import numpy
  import tensorflow.compat.v2
  import tf_quant_finance
  from tensorflow.python.framework import test_util
label_desc: Use image node_id 2 for calling a global function with example usage: multivariate_quadratic(p, x, y) and returns: unknown