Support operators with limits (e.g. \sum). Add Invisible Plus operator between number and fractions. Add support for font styles (blackboard, fraktur, etc...)
Support operators with limits (e.g. \sum). Add Invisible Plus operator between number and fractions. Add support for font styles (blackboard, fraktur, etc...)

arnog/mathlive,arnog/mathlive,arnog/mathlive,arnog/mathlive