(a) f(x) = (x-1)^3 .

Find the derivatives of the following functions and please show all steps:

(a)  f(x) = (x-1)^3 . e^4^x

(b)  y = x^3 ln(x^2 +1)

(c)  y = e^2^x + e ^-2^x over X

"c" function reads as "e squared x plus e negative squared x over X. System did not allow me to write a line as a fraction.  

Please contact me if you have any questions understanding the way this is submitted.  Thanks.