Create(exp : GeneralExpression)
---Purpose: Creates the sine of <exp>.
- returns mutable Sine;
+ returns Sine;
ShallowSimplified(me)
---Purpose: Returns a GeneralExpression after a simplification
Copy(me)
---Purpose: Returns a copy of <me> having the same unknowns and functions.
- returns mutable like me;
+ returns like me;
IsIdentical(me; Other : GeneralExpression)
---Purpose: Tests if <me> and <Other> define the same expression.