(p+a)^2=p^2+2pa+a^2
(x-12)^2=x^2-24x+144
(6y-1)^2=36y^2-12y+1
(-3x+a)^2=9x^2-6ax+a^2
(x^2-y^2)^2=x^4-2x^2y^2+y^4
(p+a)^2=p^2+2pa+a^2
(x-12)^2=x^2-24x+144
(6y-1)^2=36y^2-12y+1
(-3x+a)^2=9x^2-6ax+a^2
(x^2-y^2)^2=x^4-2x^2y^2+y^4