[BUG REPORT] Constants with exponents cause error

[dbbotkin]

Here's a work-around: if you delete the little 'E' in the exponent and the press the 'EEX' to enter the exponent, all is well. That replaces the 'E' with 'e' which, in turn, is restored to 'E' on the CAS stack.

Perhaps the little '-' and the little 'E' don't play well together?