form software package provides Symbolic manipulation system, 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 form
form is installed in your system.
Make ensure the form package were installed using the commands given below,
$ sudo dpkg-query -l | grep form *
You will get with form package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Science |
| Package | form |
| Version | 4.1-1 |
| Description | Symbolic manipulation system |
| Sub Section | Science |