Evaluating the indefinite integral $(1$x$)3$x$$dx$(1$x$)3$xdx$.$

Select one:

a$.$

$12(1$x$)4+$C$12(1$x$)4+$C

b$.$

$(1$x$)4+$C$(1$x$)4+$C

c$.$

$12(1$x$)2+$C$12(1$x$)2+$C

d$.$

$12(1$x$)2+$C