The extra expressions have nothing to do with the example and just confuse the…

doc/nextml2015/presentation.tex

@@ -271,15 +271,12 @@ int f(int x, int y){
         stringstyle=\color{violet},
         }
 \begin{lstlisting}
+import theano
 from theano import tensor as T
 x = T.scalar()
 y = T.scalar()
 z = x+y
-w = z*x
-a = T.sqrt(w)
-b = T.exp(a)
-c = a ** b
-d = T.log(c)
+f = theano.function([x, y], z)
 \end{lstlisting}
 \end{frame}