new Decimal("(e^x)1") returns Decimal with negative layer if x is negative

[James103]

For example, new Decimal("(e^-8.1)1") returns a Decimal whose layer is -8.1.

Similarly, new Decimal("(e^-22.1)1") returns a Decimal whose layer is -22.1.

Both Decimal objects have invalid layer values and may not work properly with operations.