Update 705-math-absmax.markdown

Author: Joe7M

_build/reference/705-math-absmax.markdown

@@ -1,20 +1,29 @@
 # ABSMAX
 
-> ABSMAX (...)
+> f = ABSMAX (var1 [, var2, ... , varN] )
 
-Returns the absolute max value of x.
+Returns the absolute maximum value of `var1` to `varN`. `var1` to `varN` can be numbers and arrays of numbers.
 
-```
-' absmax of three values
-print absmax(-3,-1,2)
+### Example 1: ABSMAX of several numbers
 
-' absmax of three variables
+```
 a = -3
 b = -1
 c =  2
-print absmax(a,b,c)
+print absmax(a, b, c)      ' Output: 3
+```
+
+### Example 2: ABSMAX of an array
+
+```
+a = [-3,-1,2]
+print absmax(a)            ' Output: 3
+```
 
-' absmax of an array
+### Example 3: ABSMAX of mixed parameters
+
+```
 a = [-3,-1,2]
-print absmax(a)
+b = -2
+print absmax(a, b)            ' Output: 3
 ```