(a+b）^2-16a^2(x^2+4)^2-4x^2m^4-2m^2n^2+n^4(x^2-x)^2+1/2（x^2\x)+1/164m^2-n^2-6n-92a-4b+a^2-4b^2(3a+b)^2-12ab(m-1)(m-3)+1x^2(x^2-2)+1-x^2-12xy-20y^23x^2-11xy+10y^22(a-1)-11(a-1)+129a^4-7a^2+1a^4+a^2b^2+b^4第4题是 （x^2-x)^2+1/2（x^2-x)+1/16
问题描述：
(a+b）^2-16a^2
(x^2+4)^2-4x^2
m^4-2m^2n^2+n^4
(x^2-x)^2+1/2（x^2\x)+1/16
4m^2-n^2-6n-9
2a-4b+a^2-4b^2
(3a+b)^2-12ab
(m-1)(m-3)+1
x^2(x^2-2)+1
-x^2-12xy-20y^2
3x^2-11xy+10y^2
2(a-1)-11(a-1)+12
9a^4-7a^2+1
a^4+a^2b^2+b^4
第4题是 （x^2-x)^2+1/2（x^2-x)+1/16
答