# Math Help - derivitive (quotient rule)

1. ## derivitive (quotient rule)

Not sure what to do next:

sorry for bad quality pic. took on my phone

edit: nvm i got it. i made an error with the 1. it should be a 4

edit: so now i have

$-4(x^2-1)/(x^2+1)^2$

what to do next? is this the final answer?

2. Looks final to me.