new_contents: import tensorflow as tf
  
  def calculate():
  	output = None
  	a = tf.cast(tf.constant(10), tf.float64)
  	b = tf.cast(tf.constant(2.0), tf.float64)
  	x = tf.placeholder(tf.float64)
  	y = tf.placeholder(tf.float64)
  	
  	# (a + x) / b  - a * y
  	
  	z = tf.subtract(
  		tf.divide(tf.add(a, x), b),
  		tf.multiply(a, y)
  	)
  	
  	with tf.Session() as session:
  		output = session.run(z, feed_dict = { x: 100, y: 1.5 })
  
  	return output
  
  print(calculate())
  
subject: Create tensorflow-basic-example.py