--- a/Number.st	Thu Jan 21 17:58:19 2016 +0000
+++ b/Number.st	Sat Jan 23 07:23:05 2016 +0000
@@ -1394,7 +1394,12 @@
     ^ self asFloat raisedTo:aNumber
 
     "
-     2 raisedTo: 4    
+     2 raisedTo: 4
+     -2 raisedTo: 4
+     4 raisedTo: 1/2
+     -4 raisedTo: 1/2
+     8 raisedTo: 1/3
+     -8 raisedTo: 1/3
      10 raisedTo: 4    
      10 raisedTo: -4    
     "