(2a-b²)(2a+b²)=4*a^2-b^4
(2a-b²)(2a+b²)=-(b^2-2*a)*(b^2+2*a)
(x-6x^3)²=36*x^6-12*x^4+x^2
(x-6x^3)²=x^2*(6*x^2-1)^2
(y+b)² (y-b)²=y^4-2*b^2*y^2+b^4
(y+b)² (y-b)²=(y-b)^2*(y+b)^2
(2a-b²)(2a+b²)=4*a^2-b^4
(2a-b²)(2a+b²)=-(b^2-2*a)*(b^2+2*a)
(x-6x^3)²=36*x^6-12*x^4+x^2
(x-6x^3)²=x^2*(6*x^2-1)^2
(y+b)² (y-b)²=y^4-2*b^2*y^2+b^4
(y+b)² (y-b)²=(y-b)^2*(y+b)^2