Content creation

Hi, I have started to develop some test courses using H5P in Drupal, but when I try to delete the ones I don't want, I confirm I want to delete, but they do not delete no matter what I do.

Can someone help me with this please?

Thank you.

How to add mathematical equations using latex in any h5p content ?

Is there a possibility that I create a memory game with one picture in a card and a label of the picture in the second card? thank you in advance 

https://h5p.org/node/44427