add support for next function:"CHITEST", "CHISQ.TEST", "COVARIANCE.P, "COVARIANCE.S", "ERFC.PRECISE", "FORECAST.LINEAR", "MODE.MULT", "MODE.SNGL", "NEGBINOM.DIST", "NORM.DIST", "NORM.INV", "NORM.S.DIST", "NORM.S.INV", "QUARTILE.INC", "QUARTILE.EXC", "PERMUTATIONA", "POISSON.DIST", "PHI", "SKEW.P", "STDEV.P", "STDEV.S", "T.TEST", "TRIMMEAN", "TTEST", "VAR.P", "VAR.S", "WEIBULL", "WEIBULL.DIST", "Z.TEST", "ZTEST"