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version 1.2, 2002/07/18 15:52:27	version 1.3, 2005/02/18 20:32:36
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The formula evaluator can not handle things of the form {}``x + - y''.	The formula evaluator can not handle things of the form {}``x + - y''.
If you have a random variable that may be positive or negative (as in the	If you have a random variable that may be positive or negative (as in the
example following this section), you can try wrapping the references to that	example following this section), you can try wrapping the references to that
variable in parenthesis. As always, it is a good idea to try out several
randomized versions of your problems to make sure everything works correctly.

	variable in parentheses. As always, it is a good idea to try out several
	randomized versions of your problems to make sure everything works correctly.