I got c$(1+$x$)^4$ but thats not what chegg is saying it is and i was wondering what i did wrong

$|)=e^{ln|(1+x{)}^4|+c_1}$

$|y|=e^{ln|(1+x{)}^4|}*e^{c_1}$

$y=(1+x{)}^{c_1}*e^{c_1}$

$y=((1+x{)}^4)$

$P(x)=3,,Q(x)=2x{e}^{-3x}$