Using the chain rule to find the derivative

Find the derivative of the given function.

f(x) = tan^2 ( 5 ( 2 x + 1 )^(1/2) )

f '(x) = A tan^B ( 5 ( 2 x + 1 )^(1/2) ) sec^C ( 5 ( 2 x + 1 )^(1/2) ) ( 2 x + 1 )^D

Find A,B,C,D

A = 2

B = 1

C= 2

D= 5