I often teach online using a wacom+tablet + handwriting app. I write a lot of equations. The slides are shared with students. What would be really nice is, if

I often teach online using a wacom+tablet + handwriting app. I write a lot of equations. The slides are shared with students. What would be really nice is, if I could feed slides.pdf to something like this, and it did OCR on every handwritten text (english or equation), and put the output as an invisible layer under the text. Will make the slides searchable. I understand though, OCR on handwritten equations, is a very difficult problem.