1)(2m+n-p)^2
=(2m+n)^2-2p(2m+n)+p^2
=4m^2+4mn+n^2-4pm-2pn+p^2
(2) (x+1)^2(x-1)^2
=(x^2-1)^2
=x^4-2x^2+1
(3)(x+y)^2(x-y)
=(x^2-y^2)(x+y)
=x^3+x^2y-xy^2-y^3
(4)(2a-3b+c)(c-2a+3b)
=c^2-(2a-3b)^2
c^2-4a^2+12ab-9b^2
1)(2m+n-p)^2
=(2m+n)^2-2p(2m+n)+p^2
=4m^2+4mn+n^2-4pm-2pn+p^2
(2) (x+1)^2(x-1)^2
=(x^2-1)^2
=x^4-2x^2+1
(3)(x+y)^2(x-y)
=(x^2-y^2)(x+y)
=x^3+x^2y-xy^2-y^3
(4)(2a-3b+c)(c-2a+3b)
=c^2-(2a-3b)^2
c^2-4a^2+12ab-9b^2