/usr/share/doc/libopentoken3-dev/examples/ASU_Example_5_10/Example.txt is in libopentoken3-dev 4.0b-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | 10 + 5 * 6
(10 + 5) * 6 * (2 + 3)
5 * (2 + (3 * 4))
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