...Somewhat more useful then a calculator but not sophisticated as mathcad or linux octave. Small app, does not take up much space. The following is an example of the type of input it takes:
apple = 3, pear = 7
78 * (apple + pear)
the output would be 780
A Shell Script for Quizzing the whole class of students and log result
...Also see this collection of bash scripts : https://sourceforge.net/projects/bash-shell-scripting-in-minute/ and this script : https://sourceforge.net/projects/command-output-to-html-table/