(-a^0 * a^3)^5
Gotta' be a little careful, here .... a^0 = 1 but that "-" in front of it makes it negative !!! ...so we have
(-1 * a^3)^5 and by a property of exponents, we have
(-1)^5 * (a^3)^5 =
-1 * a^15 =
-a^15
