context software package provides powerful TeX format, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install context
context is installed in your system.
Make ensure the context package were installed using the commands given below,
$ sudo dpkg-query -l | grep context *
You will get with context package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | TeX |
| Package | context |
| Version | 2016.05.17.20160523-1 |
| Description | powerful TeX format |
| Sub Section | TeX |