Find the derivative of 5e^(-2x3+10x^8) using the chain rule. Which of the following options correctly represents the derivative?
a) e^(-2x3+10x^8)
b) -6x2e^(-2x3+10x^8)
c) -6x2e^(-2x3+80x^7)
d) -6x2e^(-6x3+80x^7)