/usr/lib/open-axiom/input/parabola.input is in open-axiom-test 1.4.1+svn~2626-2ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | -- @(#)parabola.input 1.1 89/09/07 20:55:08
draw(curve(t**2 + 2*t - 1,t**2 + t - 2),t = -4..3)
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