negative number raised to even power

[TASP]

2
chs
^
2
chs
y\x

yields .25 on my 41, error flash on the 55, error flash on the 45, error flash on the 80.


2
chs
^
2
chs
x\y

yields error flash on my 35


(-2)^(-2) endline on the 71 yields .25