Please tell me how to solve below 3 questions

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Use the derivative rules to find derivative

1) g(x)=3x2+5x8tan1(x)

which one is the correct answer (Question 1)?

a) g(x)=(1+x2)(6x+5)1

b)g(x)=(3x2+5x8)21+x23x2+5x8(6x+5)tan1(x)

c)g(x)=(3x2+5x8)21+x23x2+5x8+(6x+5)tan1(x)

d) g'(x) = (3x^2+5x-8) (sec^-1 (x))^2 - (6x+5)tan^-1(x) / (3x^2 +5x-8)^2

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evaluate the derivative of the given function at the specified value.

2) g(t)=cos3(2t), Find g' (Pi / 12)

3) h(t)=(3t5)et27t+6, Find h' (6)