That doesn’t seem true, in the following model (and/or query - Causal), “New Variable” has the same formula as the one mentioned by you in your post without the brackets, could you elaborate a little more on what exactly do you mean by “having trouble”, maybe we can help you out better.
Hey Jason, thanks for the feedback! I just updated our documentation - you can now find some examples in our formulas article. Please let us know if you keep having issues!