title: multiple values of a variable in same equation
body: <p><code>A = [18.0,10.0]; B = [13.0,15.0]; C = [10.5,12.0];</code> </p>
  
  <p>these are the variables and think about function like</p>
  
  <pre><code>def hlf(A,B,C):
         return A**(-1.0/2.0)-0.2*B-43+C
  print "T:"
  hlf(A,B,C)
  </code></pre>
  
  <p>Firstly, I want to use first values of the A B and C in the equation. After I want to use second values. How can I do this ? </p>