Update 729-math-determ.markdown

Author: Joe7M

_build/reference/729-math-determ.markdown

@@ -1,11 +1,13 @@
 # DETERM
 
-> DETERM (A[, toler])
+> D = DETERM (A [, toler])
 
-Determinant of A. toler = tolerance number. the absolute value of the lowest acceptable number. default = 0.
+Determinant of `A`. `toler` is the tolerance number. It is equivalent to the absolute value of the lowest acceptable number. Default value is `0`.
+
+### Example
 
 ```
 A = [ 0, 1, 2; 3, 2, 1; 1, 1, 0]
-print determ(A)
+print determ(A)                    ' Output: 3
 ```