Build 2.9.0.18 adds support for 56 new functions introduced in Excel 2010. Listed below. Most of these functions are actually variants of existing ones that Microsoft apparently chose to add in order to fix calculation problems. For instance, there is a GAMMADIST() function in Excel for a long time, and now there is an additional GAMMA.DIST() function. Notice the dot.


AGGREGATE | Returns an aggregate in a list or database
BETA.DIST | Returns the beta probability distribution function
BETA.INV | Returns the inverse of the cumulative beta probability density function
BINOM.DIST | Returns the individual term binomial distribution probability
BINOM.INV | Returns the smallest value for which the cumulative binomial distribution is greater than or equal to a criterion value
CHISQ.DIST | Returns the left-tailed probability of the chi-squared distribution
CHISQ.DIST.RT | Returns the right-tailed probability of the chi-squared distribution
CHISQ.INV | Returns the inverse of the left-tailed probability of the chi-squared distribution
CHISQ.INV.RT | Returns the inverse of the right-tailed probability of the chi-squared distribution
CHISQ.TEST | Returns the test for independence : the value from the chi-squared distribution for the statistic and the appropriate degrees of freedom
CONFIDENCE.NORM | Returns the confidence interval for a population mean, using a normal distribution
CONFIDENCE.T | Returns the confidence interval for a population mean, using a Student's T distribution
COVARIANCE.P | Returns population covariance, the average of the products of deviations for each data point pair in two data sets
COVARIANCE.S | Returns sample covariance, the average of the products of deviations for each data point pair in two data sets
EXPON.DIST | Returns the exponential distribution
F.DIST | Returns the left-tailed F probability distribution (degree of diversity) for two data sets
F.DIST.RT | Returns the right-tailed F probability distribution (degree of diversity) for two data sets
F.INV | Returns the inverse of the left-tailed F probability distribution
F.INV.RT | Returns the inverse of the right-tailed F probability distribution
F.TEST | Returns the result of an F-test, the two-tailed probability that the variances in Array1 and Array2 are not significantly different
GAMMA.DIST | Returns the gamma distribution
GAMMA.INV | Returns the inverse of the gamma cumulative distribution
HYPGEOM.DIST | Returns the hypergeometric distribution
ISO.CEILING | Rounds a number up, to the nearest integer or to the nearest multiple of significance
LOGNORM.DIST | Returns the lognormal distribution of x, where ln(s) is normally distributed with parameters Mean and Standard-dev
LOGNORM.INV | Returns the inverse of the lognormal cumulative distribution of function x, where ln(x) is normally distributed with parameters Mean and Standard-dev
MODE.MULT | Returns a vertical array of the most frequently occurring or repetitive values in an array or range of data
MODE.SNGL | Returns the most frequently occurring or repetitive value in an array or range of data
NEGBINOM.DIST | Returns the negative binomial distribution, the probability that there will be Number_f failures before the number_s-th success, with Probability_s probability of a success
NETWORKDAYS.INTL | Returns the number of while workdays between two dates with custom weekend parameters
NORM.DIST | Returns the normal distribution for the specified mean and standard deviation
NORM.INV | Returns the inverse of the normal cumulative distribution for the specified mean and standard deviation
NORM.S.DIST | Returns the standard normal distribution (has a mean of zero and a standard deviation of one)
NORM.S.INV | Returns the inverse of the standard normal cumulative distribution (has a mean of zero and a standard deviation of one)
PERCENTILE.EXC | Returns the k-th percentile of values in a range, where k is in the range 0...1, exclusive
PERCENTILE.INC | Returns the k-th percentile of values in a range, where k is in the range 0...1, inclusive
PERCENTRANK.EXC | Returns the rank of a value in a data set as a percentage of the data set as a percentage (0...1, exclusive) of the data set
PERCENTRANK.INC | Returns the rank of a value in a data set as a percentage of the data set as a percentage (0...1, inclusive) of the data set
POISSON.DIST | Returns the Poisson distribution
QUARTILE.EXC | Returns the quartile of a data set, based on percentile values from 0...1, exclusive
QUARTILE.INC | Returns the quartile of a data set, based on percentile values from 0...1, inclusive
RANK.AVG | Returns the rank of a number in a list of numbers : its size relative to other values in the list; if more than one value has the same rank, the average rank is returned
RANK.EQ | Returns the rank of a number in a list of numbers : its size relative to other values in the list; if more than one value has the same rank, the top rank of that set of values is returned
STDEV.P | Calculated standard deviation based on the entire population given as arguments
STDEV.S | Estimates standard deviation based on a sample
T.DIST | Returns the left-tailed Student's T-distribution
T.DIST.2T | Returns the two-tailed Student's T-distribution
T.DIST.RT | Returns the right-tailed Student's T-distribution
T.INV | Returns the left-tailed inverse of the Student's T-distribution
T.INV.2T | Returns the two-tailed inverse of the Student's T-distribution
T.TEST | Returns the probability associated with a Student's T-test
VAR.P | Calculates variance based on the entire population
VAR.S | Estimates variance based on a sample
WEIBULL.DIST | Returns the Weibull distribution
WORKDAY.INTL | Returns the serial number of the date before or after a specified number of workdays with custom weekend parameters
Z.TEST | Returns the one-tailed P-value of a Z-test