Factor (ab + ac + bc)^3 - a^3*b^3.
a3−b3=(a−b)(a2+ab+b2) where a=ab+ac+b and b=ab
(substituting this into the equation we would get)
c(a+b)(3a2b2+3a2bc+3ab2c+a2c2+2abc2+b2c2)
+34 
