I was off track with pstoedit. Following https://answers.launchpad.net/inkscape/+question/170724 I was directed to this bug report https://bugs.launchpad.net/inkscape/+bug/742364 .

Hello All Importing a (pdflatex generated) PDF, the output looks fine -- except that a pair of large brackets are missing from a formula. Following [1] I tried "pstoedit -f plot-svg test.pdf test.svg", and the issue appears to be a couple of warnings like: "unable to map [c2] glyph na...