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import tensorflow as tf


    

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g = tf.Graph()


    

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with g.as_default():
    
    x = tf.constant([8], name="x_const")
    y = tf.constant([5], name="y_const")
    sum1 = tf.add(x, y, name="x_y_sum")
        
    z = tf.constant([7], name="z_const")
    sum2 = tf.add(z, sum1, name="x_y_z_sum")

    with tf.Session() as sess:
        print 'Sum1 = ', sum1.eval()
        print 'Sum2 = ', sum2.eval()


    

    




Sum1 =  [13]
Sum2 =  [20]

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