XLFNREGEXP
XLFNREGEXP = '/(?<!_xlfn[.])\\b(' . 'beta[.]dist' . '|beta[.]inv' . '|binom[.]dist' . '|binom[.]inv' . '|ceiling[.]precise' . '|chisq[.]dist' . '|chisq[.]dist[.]rt' . '|chisq[.]inv' . '|chisq[.]inv[.]rt' . '|chisq[.]test' . '|confidence[.]norm' . '|confidence[.]t' . '|covariance[.]p' . '|covariance[.]s' . '|erf[.]precise' . '|erfc[.]precise' . '|expon[.]dist' . '|f[.]dist' . '|f[.]dist[.]rt' . '|f[.]inv' . '|f[.]inv[.]rt' . '|f[.]test' . '|floor[.]precise' . '|gamma[.]dist' . '|gamma[.]inv' . '|gammaln[.]precise' . '|lognorm[.]dist' . '|lognorm[.]inv' . '|mode[.]mult' . '|mode[.]sngl' . '|negbinom[.]dist' . '|networkdays[.]intl' . '|norm[.]dist' . '|norm[.]inv' . '|norm[.]s[.]dist' . '|norm[.]s[.]inv' . '|percentile[.]exc' . '|percentile[.]inc' . '|percentrank[.]exc' . '|percentrank[.]inc' . '|poisson[.]dist' . '|quartile[.]exc' . '|quartile[.]inc' . '|rank[.]avg' . '|rank[.]eq' . '|stdev[.]p' . '|stdev[.]s' . '|t[.]dist' . '|t[.]dist[.]2t' . '|t[.]dist[.]rt' . '|t[.]inv' . '|t[.]inv[.]2t' . '|t[.]test' . '|var[.]p' . '|var[.]s' . '|weibull[.]dist' . '|z[.]test' . '|acot' . '|acoth' . '|arabic' . '|averageifs' . '|binom[.]dist[.]range' . '|bitand' . '|bitlshift' . '|bitor' . '|bitrshift' . '|bitxor' . '|ceiling[.]math' . '|combina' . '|cot' . '|coth' . '|csc' . '|csch' . '|days' . '|dbcs' . '|decimal' . '|encodeurl' . '|filterxml' . '|floor[.]math' . '|formulatext' . '|gamma' . '|gauss' . '|ifna' . '|imcosh' . '|imcot' . '|imcsc' . '|imcsch' . '|imsec' . '|imsech' . '|imsinh' . '|imtan' . '|isformula' . '|iso[.]ceiling' . '|isoweeknum' . '|munit' . '|numbervalue' . '|pduration' . '|permutationa' . '|phi' . '|rri' . '|sec' . '|sech' . '|sheet' . '|sheets' . '|skew[.]p' . '|unichar' . '|unicode' . '|webservice' . '|xor' . '|forecast[.]et2' . '|forecast[.]ets[.]confint' . '|forecast[.]ets[.]seasonality' . '|forecast[.]ets[.]stat' . '|forecast[.]linear' . '|switch' . '|concat' . '|countifs' . '|ifs' . '|maxifs' . '|minifs' . '|sumifs' . '|textjoin' . '|filter' . '|randarray' . '|sequence' . '|sort' . '|sortby' . '|unique' . '|xlookup' . '|xmatch' . '|arraytotext' . '|call' . '|let' . '|register[.]id' . '|valuetotext' . ')(?=\\s*[(])/i'