Calculate Functions
F_CEILING
F_DIV
F_DOUBLEABS, F_ABS
F_DZERO
F_EVEN
F_EXP
F_FACT, F_FACTORIAL
F_FLOOR
F_FRAC
F_INTEGERABS
F_ISDIVISIBLEBY
F_LN
F_LOG
F_LOG10
F_MODULO
F_POWER
F_PROZENTE
F_REMAINDER
F_SIGN
F_SQRT
F_Z