(a+b-a+b)^3((a+b)^2+a^2-b^2+(a-b)^2)(2x+y+x-2y)^3((2x+y)^2-(2x+y)(x-2y)+(x-2y)^2)(2mn-1+1)^3((2mn-1)^2-2mn+1+1)(3a-2b+2b)((3a-2b)^2-8b(3a-2b)+4b^2) = b^3(3a^2+b^2)(3x-y)^3(5x^2+3xy+7y^2-2x^2)8m^3(4m^2n^2-6mn+3)3a(9a^2-36ab+36b^2)=8b^3m^3(3a^2+b^2)(3x-y)^3(5x^2+3xy+7y^2-2x^2)(4m^2n^2-6mn+3)3a(9a^2-36ab+36b^2)