stored a different value in the Calc variable @samp{e}; but this would
be a bad idea in any case if you were also using natural logarithms!
-Among the logical functions, @tfn{(@var{a} <= @var{b})} changes to
+Among the logical functions, @tfn{!(@var{a} <= @var{b})} changes to
@tfn{@var{a} > @var{b}} and so on. Equations and inequalities where both sides
are either negative-looking or zero are simplified by negating both sides
and reversing the inequality. While it might seem reasonable to simplify