原式=(x²-2xy+y²+4xy)(x²+2xy+y²-4xy)-11
=(x²+2xy+y²)(x²-2xy+y²)-11
=(x+y)²(x-y)²-11
=[(x+y)(x-y)]²-11
=(x²-y²)²-11
=45²-11
=2014
原式=(x²-2xy+y²+4xy)(x²+2xy+y²-4xy)-11
=(x²+2xy+y²)(x²-2xy+y²)-11
=(x+y)²(x-y)²-11
=[(x+y)(x-y)]²-11
=(x²-y²)²-11
=45²-11
=2014