FormatNumber(Expression, NumDigitsAfterDecimal, IncludeLeadingDigit, UserParensForNegativeNumbers, GroupDigits)
Returns an expression formatted as a number. 

FormatPercent(Expression, NumDigitsAfterDecimal, IncludeLeadingDigit, UserParensForNegativeNumbers, GroupDigits) 
Returns an expression formatted as a percentage (multiplied by 100) with a trailing % character.

FormatCurrency(Expression, NumDigitsAfterDecimal, IncludeLeadingDigit, UserParensForNegativeNumbers, GroupDigits)
Returns an expression formatted as a currency value

FormatDateTime(Date, FormatType)
Returns an expression formatted as a date or time. 

LTrim(string)
Returns a string without leading spaces

RTrim(string)
Returns a string without trailing spaces

Trim(string)
Returns a string without leading and trailing spaces

Len(string)
Returns the length of the specified string.

Left(string, length)
Returns a specified number of characters from the left side of a string.

Right(string, length)
Returns a specified number of characters from the right side of a string.

Mid(string, start, length)
Returns a specified number of characters from a string.
