Compute the derivative of the function

f$($x$)=($x$42$x$2+7$x$+4)3$f$($x$)=($x$42$x$2+7$x$+4)3.$

Select one:

a$.$

$4($x$42$x$2+7$x$+4)2(4$x$34$x$+7)4($x$42$x$2+7$x$+4)2(4$x$34$x$+7)$

b$.$

$3($x$42$x$2+7$x$+4)23($x$42$x$2+7$x$+4)2$

c$.$

$3($x$42$x$2+7$x$+4)2(4$x$34$x$+7)3($x$42$x$2+7$x$+4)2(4$x$34$x$+7)$

d$.$

$12($x$42$x$2+7$x$+4)2$