I’m mainly concerned with people using it for calculating things personal to them, finances/taxes comes to mind first. While the search engine may not know with certainty what the numbers represent, they have so much data on you that they could very well start inferring what those numbers are to add to your profile. For example if you suddenly do a ton of calculations in the days leading up to when taxes are due and all the numbers have two decimal places, it would be a pretty big hint to them. Or if you always do budget calculations on the days you get paid, they might be able to recognize that pattern and work out when your payday is and what your income, expenses, and savings are. And they definitely have AI to make these inferences for them so they can do it for every single user. IDK I might just be paranoid though.