simplify 7p^6/(7p+z)-(p^5-1/7p^4z+1/49p^3z^2-1/343p^2z^3+pz^4/7^4)+z^5/7^5

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.