integrate 2*m*(-2*x^3-R1^3)/(x^2*(R2^3-R1^3)-x*2*m(x^3-R1^3)) dx

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.