Specifically, can I write something like "—(x)—"?
For example,
I thought x—(which was y)—so z.
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Sign up to join this communitySpecifically, can I write something like "—(x)—"?
For example,
I thought x—(which was y)—so z.
According to the UIS Center for Academic Success:
No mark of punctuation should ever precede a parentheses, but you can use punctuation after the closing parentheses if necessary.
This means no, don't punctuate like that. In fact, they seem to recommend against variations on what you want to do, as dashes and parentheses "must be used judiciously, and sparingly".
Though this is only one style recommendation, it matches up with how I've seen people write across many different types of writing.
In your context, I would use commas. No need to over-punctuate.