(1)4x2-64,=4(x2-16),=4(x+4)(x-4);(2)m3(a-2)+m(2-a),=m3(a-2)-m(a-2),=m(a-2)(m2-1),=m(a-2)(m+1)(m-1);(3)x4-8x2y2+16y4,=(x2-4y2)2,=[(x+2y)(x-2y)]2,=(x+2y)2(x-2y)2.