Implemented Operations:

+Double, -Double, !Boolean

Double+Double, Double-Double, Double*Double, Double/Double, String+String, Double=Double, String=String, Boolean=Boolean, Double!=Double, String!=String, Boolean!=Boolean, Double>Double, Double if(Boolean,Double,Double), if(Boolean,String,String), if(Boolean,Boolean,Boolean), sum(Double,Double,.....,Double), floor(Double), ceil(Double), round(Double)