Question 44119
Rearrange to make the answer more obvious:
{{{(4x^3+x-3x^2)-(4x-2x^2+4x^3)}}}
{{{(4x^3-3x^2+x)-(4x^3-2x^2+4x)}}}
{{{(4-4)x^3-(3-2)x^2+(1-4)x}}}
{{{0x^3-1x^2-3x}}}
and the answer is:
{{{-x^2-3x}}}

I hope this helps 
P.S. I am trying to start up my own homework help website. I would be extremely grateful if you would e-mail me some feedback on the help you received to adam.chapman@student.manchester.ac.uk