$ sudo apt-get update
$ sudo apt-get install libjs-asciimathml 

libjs-asciimathml is installed in your system.

Make ensure the libjs-asciimathml package were installed using the commands given below,

$ sudo dpkg-query -l | grep libjs-asciimathml *

You will get with libjs-asciimathml package name, version, architecture and description in a table

libjs-asciimathml package basic information: