I am so happy tools like these gets created and is available for free.
When growing up, I had difficulty learning math and I wasn't able to ask my parents for help so much. That is when I found PhotoMath, it changed my life, it became my second teacher and it was for free! I don't think Google even owned it at the time.
I remember being very scared of losing it one day. Luckily that never happened, but I will never forget how much these math tools helped me growing up.