Since we have parentheses around the negative 3 here and the exponent, the 4 is
written outside of those parentheses. That means that the exponent applies to
the entire quantity that's inside the parentheses. So, the number that counts as
the base number is negative 3. Negative 3 is the thing that we want to multiply
by itself 4 times. So, that means we can rewrite this. As negative 3 times
negative 3 times negative 3 times negative 3. Now you can just evaluate that
numerically. Negative 3 times negative 3 is just positive 9. So you get positive
9 multiplied by itself which is just equal to 81. So our final answer is 81