GNU libmatheval enables the evaluation of string representations
of mathematical functions of single or multiple variables. It
has both C and Fortran 77 interfaces. In particular, it enhances 
the capabilities of the h5utils software.

This Slackbuild includes a patch sourced from aur.archlinux.org,
the version here is from github.com/easybuilders because it is
prefixed by a useful short comment.