[Kst] Equation parser - a possible BUG.

[Ron Daisy]

Dear George Staikos,

As far as I understand you are the one that wrote the equation parser of kst.

While playing with KST I found that the equation parsing failed to parse
correctly the following equation:

	exp(-(x-1)^2)

The problem is that it performs the unary minus operator before the power 
of 2 as dictated
by the precedence rules of arithmetics. This problem will show it self in 
all similar equation
and seems to be critical.


Hope helping improving the KST quality,

Best regards,

Ron.