题目内容
(x+y)2(x-y)2
x4-x2y2+y4
计算:[-(-a-b)]÷
()1996×(1.5)1995×(-1)1995
(2x+1)(x-1)(2x-3)(x-2)
(3x+y)(3x-y)
(a+b+c)2.
(3x-2y+1)(3x-2y-1)
计算
÷(-2)2×÷(-0.1)2.
计算:103+×(-7)0-(-3)3×0.3-1+|-14|