(FX Chem) will empower you to easily write most chemical equations with arrows, double arrows, catalysts, conditions, physical state designations, and even nuclear notation.
R Clark Journal of Chemical Education
FX Equation 4 - Quick Tour
Just because it is simple to use, doesn't mean that FX Equation isn't capable. You can create just about any equation a
secondary school teacher or student would ever need - and many they wouldn't!