I would like to input a numeric value and output also a numeric value after it has gone through some nodes realizing a mathematical function.
I know how to realize the mathematical function with multiply and adding nodes (here: f(x)=x^2 + 5x ) but I do not know how to continue from the ADD-node on to display the output as a number.

Print Screenbutton on your keyboard. How do you make the images in your questions? I like the style, and how it still conveys the meaning. – David Sep 16 '15 at 00:32