jacal software package provides Interactive symbolic math system, you can install in your Debian 8 (Jessie) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install jacal
jacal is installed in your system.
Make ensure the jacal package were installed using the commands given below,
$ sudo dpkg-query -l | grep jacal *
You will get with jacal package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Mathematics |
| Package | jacal |
| Version | 1b9-5 |
| Description | Interactive symbolic math system |
| Sub Section | Math |