expand a^2.(3/(8(a+b)(c+a))-1/(2(ab+bc+ca))-5b/(8(a+b)(b+c)(c+a)))+b^2.(3/(8(a+b)(b+c))-1/(2(ab+bc+ca))-5c/(8(a+b)(b+c)(c+a)))

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.