Similar issues as well, one solution is to export the file to Pages 09 (v 4.3). It will then print fine with all the text and symbols within the table showing up fine. This is very aggravaging and I have seen several related posts. All report that within a table, subscrpts, arrows, exponents etc do not print or export to PDF. Outside a table printing is also fine.
Assuming you still have Pages 09, use the File>Export option. Or just work in Pages 09.
I cannot find anyway to make Pages 5.2 do this correctly, no matter how I adjust all the table settings, such wrapping, ligatures, data type (text vs custom, vs scientific etc)
I reporte this a a bug to Apple.