So I am trying to solve this problem, and I was able to figure out the first answer, but it keeps saying that the second answer (and thus the third answer) is wrong, and I do not know where I am going wrong,

Let g(t) = 2t dx a) Evaluate d 2t 2 da = 2*e^(4*t^2) dt Jo b) Evaluate +3 ex (t* 6 ) * 3* + 1 2 dt dac = Jo c) Evaluate g (t ) = -2*e^(4*t^2)+3*e^(t*6)*t^2