Differentiate using the chain rule:
A) f(x) = (4x-x²)¹00
B) y = (1+x⁵)(1/5)
C) f(t) = e(-2t)cos(4t)
D) f(x) = 10(1-x²)
E) f(t) = √(t/(t²+4))
F) f(x) = (x³ + 2x)¹0