Which subject in school did you find impossible to master?

The school (and system) in which I studied in had three languages, English of course as the first, Marathi as a second language (which is of the state) and third Hindi (widely misunderstood as the national language of India by most Indians, which is not) till grade 7 and later instead of that Sanskrit, till I passed out school. While English was a cakewalk for me and Sanskrit was purely for mark hogging thanks to our great education system (sarcasm hint not required), it’s the other two are really struggled with. And that moment of relief when I passed school and never had to deal with them anymore!