[tex](a+b)^2(a-b) = (a^2-b^2)(a+b)\\\\L = (a+b)^2(a-b) = (a+b)(a+b)(a-b)\\P = (a^2 - b^2)(a+b) = (a-b)(a+b)(a+b) = (a+b)(a+b)(a-b)\\\\L=P\\[/tex]
