Ok, you have some exponentiation going on there, twice. What I would do is convert the rectangular representations you have into polar ones via the following: if you have
Exponentiation, and multiplication for that matter, is easier in the polar representation of complex numbers than in the rectangular. However, I would definitely use rectangular for addition and subtraction. So, I would get those numbers into polar, do the exponentiation, convert back to rectangular, and see what you get.