Question 876544
{{{(x+1)^3+(x-1)^3}}}

use the identity {{{a^3+b^3=(a+b)(a^2-ab+b^2)}}}


{{{((x+1+x-1))((x+1)^2-(x+1)(x-1)+(x-1)^2))}}}


{{{2x(x^2+2x+1-x^2+1+x^2-2x+1)}}}


{{{2x(x^2+3))}}}