5. Differentiate the following function: f(x) = 1/4e^-x

f '(x) =

6. Differentiate: f(x) = 7/40e^{x^3}

f '(x) =

7. Differentiate the following function: f(x) = 15 + 9e^5x

f '(x) =

8. Differentiate: f(x) = x⁴ - 7e^7x

f '(x) =

9. Differentiate: f(x) = x⁸e^5x

f '(x) =

10. Differentiate: f(x)= e^3x/ x⁹

f ' (x) =