@MartinSleziak SearchOnMath now charges US$ 4.49 per month for a private subscription (https://www.searchonmath.com/terms-of-use). Without that, many search results are hidden.
> Our billing model will be updated on February 21 and full access to SearchOnMath results will be restricted to subscribers. Even though everyone will still be able to access the top-hit result and some others, please do consider subscribing. Thanks for using SearchOnMath!
It seems that the SearchOnMath changed from "some results are hidden for non-subscribers" to "all results are hidden for non-subscribers". At least that's my impression based on a few searches that I've done recently.
