Documentation update

README.md

@@ -2,8 +2,22 @@
 
 Math allows you to execute many PHP math functions in your ExpressionEngine templates without needing to enable PHP parsing.
 
+## Quick Tag Reference (full documentation below)
+
+	formula="(5 * 2) / [1]" — math formula (required) supports the following operators as well as bitwise + - * / % ++ -- < > <= => != <> ==
+	params="{var}|{var2}" — pipe delimited list of numeric parameters to be replaced into formula, recommended due to use of PHP eval (default: null)
+	decimals="2" — sets the number of decimal points (default: "0")
+	decimal_point="." — sets the separator for the decimal point (default: ".")
+	thousands_seperator="," — sets the thousands separator; (default: ",")
+	absolute="yes" — return the absolute number of the result (defaults: "no")
+	round="up|down|ceil" — whether to round the result up or down (defaults: no rounding)
+	numeric_error="Error" — message returned when non-numeric parameters are provided (default: "Invalid input")
+	trailing_zeros="yes" — include trailing 0 decimal places (defaults: "no")
+
 ## Parameters
 
+More detailed reference.
+
 ### formula="(5 * 2) / [1]"
 
 This is a required parameter and supports the following standard PHP operators as well as bitwise operators:
@@ -65,6 +79,7 @@ Example:
 Output: 5 (where {total_results} is 10)
 
 	{exp:math formula="2/3" decimals="2" round="up"}
+
 Output: 0.67
 
 ### numeric_error="Error"