Advanced math: a collection of builtin functions
By combining mathematical operators, you can create practically any type of mathematical formula. Because some mathematical formulas are cumbersome, the integration engine provides some builtin functions for performing more advanced calculations. The following table displays some of those builtins:
Function  Description 

abs 
Computes the absolute value of its argument. 
remainder 
Computes the remainder of a division of whole numbers. 
round 
Turns a floatingpoint number into a whole number using the usual rounding technique (2.1 becomes 2 and 2.78 becomes 3).

ceil 
Returns the lowest integer which is still greater than the argument.

floor 
Returns the highest integer which is still lower than

integerPortion 
Returns integer part of a specified floatingpoint number.

decimalPortion 
Returns decimal part of a specified floatingpoint number.
