new_contents: import theano.tensor as T
  import numpy as np
  from theano import function
  
  x = T.dvector('x')
  y = T.dvector('y')
  z = x * y
  vec_elemwise = function([x, y], z)
  
  a = np.array([1,2,3])
  b = np.array([1,2,3])
  print(vec_elemwise(a, b))
subject: add math utils