lim n->inf (4n^5-2n^4+1)/(n^3+4n+2)-(8n^7-4n^6)/(2n^5-1)

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.