To recap, 3 + 6 + (-5) + 1 + (-1) + 1 + (-4) + (-1) = ...
The answer is 0
Let's go step by step:
1) What I would normally do is separating the negative and positive numbers, for convenience:
3 + 6 + 1 + 1 + (-5) + (-4) + (-1) + (-1)
2) Then, just get the sum of each group:
11 + (-11)
3) Now add them up and you get the answer:
First, you need to rewrite the question because it's a little vague now. What type chemical formula? It's a very broad term https://en.wikipedia.org/wiki/Chemical_formula, please specify which one. After you've rewritten it, I'd be happy to answer your question. Right now, I can't because I cannot infer what you are asking, I only got a little sense about it. Notify me when you've fixed it, I will then either edit this into an answer or write a completely new answer.
P/s: I'm not trying to be a d**k here, I'd love to help you if I understand the question. And you can help me understand it by fixing the wording of it.