When dealing with to the power of, also referenced as exponents the system is quite tricky.
First off, exponents work like this:
2^2 = 2 * 2 = 4 5^4 = 5 * 5 * 5 * 5 = 625
Now when it comes to negative exponents you must first convert it to a fraction, basically the said number the exponent is attached to is flipped and the same rule applies, for example: