0^0

@Graphth Testing on all my calculators:
TI-34:            0^0= Domain Error
TI-36X II:        0^0= Domain Error
Sharp El-531X:    0^0= Error 2
TI-nspire cx CAS: 0^0= undef
                  x^0= 1, "Domain of the result might be larger than the domain of the input"
                  0^x= 0^x
W Alpha:          0^0= (indeterminate)
                  x^0= 1
                  0^x= 0 if x is positive, indeterminate if x is real
Mathematica:      0^0= Indeterminate
                  x^0= 1
                  0^x= 0^x
Python3:          0**0= 1