ABS( n )
This function returns  | n |  (the absolute value of n).  "n" can be a number or any numeric expression.

SQR(n)
This function returns the square root of the number or numeric expressioin n.

EXP( n )
This function returns e ^ n,   with e being 2.7182818 . . .

LOG( n )
This function returns the natural log of  n.

INT( n )
This function removes the fractional part of number, which is the part of the number after the decimal point, leaving only the whole number part behind.
