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+dnl @ ../doc/m4.texi:6336: Origin of test
+dnl @ expected status: 0
+dnl @ extra options:
+dnl @ Copyright (C) 2006, 2007, 2008, 2009 Free Software
+dnl @ Foundation, Inc.
+dnl @ This file is free software; the Free Software Foundation
+dnl @ gives unlimited permission to copy and/or distribute it
+dnl @ with or without modifications, as long as this notice
+dnl @ is preserved.
+eval(`2 ** 3 ** 2')
+dnl @result{}512
+eval(`(2 ** 3) ** 2')
+dnl @result{}64
+eval(`0 ** 1')
+dnl @result{}0
+eval(`2 ** 0')
+dnl @result{}1
+eval(`0 ** 0')
+dnl @result{}
+dnl @error{}m4:stdin:5: divide by zero in eval: 0 ** 0
+eval(`4 ** -2')
+dnl @error{}m4:stdin:6: negative exponent in eval: 4 ** -2
+dnl @result{}