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@@ -53,8 +53,15 @@ Line breaks are possible to, just by inserting `\\`.
 If you use python2 you may use the following code snipped
 
     import urllib
-    urllib.quote(r'ds^2 = -c^2 dt^2 + dx^2 + dy^2 + dz^2\\ ds^2 = \eta_{\mu\nu} dx^\mu dx^\nu')
+    s = urllib.quote(r'ds^2 = -c^2 dt^2 + dx^2 + dy^2 + dz^2\\ ds^2 = \eta_{\mu\nu} dx^\mu dx^\nu')
+    print(s)
 
 to get
 
 ![equation](http://latex.codecogs.com/gif.latex?ds%5E2%20%3D%20-c%5E2%20dt%5E2%20%2B%20dx%5E2%20%2B%20dy%5E2%20%2B%20dz%5E2%5C%5C%20ds%5E2%20%3D%20%5Ceta_%7B%5Cmu%5Cnu%7D%20dx%5E%5Cmu%20dx%5E%5Cnu)
+
+If there is no python console available then you may use:
+
+http://doc.pyschools.com/console
+
+and type in the code given above there. Then copy the string printed by the print statement into the url http://latex.codecogs.com/gif.latex? right after the ?.
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