I am supposed to know this by heart and I do:

http://www.wolframalpha.com/input/?i=integral+(1%2F(x^2+%2B+1))

However, on a specific problem I'm having, I need to know to get the following:

http://www.wolframalpha.com/input/?i=integral+1%2F(x^2+%2B+36)

My question is:

Is there a way for me to use what I have memorized to derive the second link? Like how can I make sense of the second link?

Any input would be greatly appreciated!

Thanks in advance!