Single line url pointing to file with definitions. eg:
https://raw.githubusercontent.com/judovana/jenkins-report-generic-chart-column/master/src/main/resources/io/jenkins/plugins/genericchart/presetEquations
or
The definitions itself. See examples Note, that id is mandatory: more ifo The syntax is as you saw above:

• empty lines ignored
• behind hash(#) are comments and examples
• First comment si mandatory, and is ID
• after comments follow expression itself as by ParserNG rules
• It can be multilined for readability (as ParserNG's --trim)
• parameters are included substitued into expression via /*1*/ for first param, /*2*/ for second and os on