- a2-8a+169-a2÷16-a29+6a+a2.
- 化简的结果是( ) A.-x2 B.-x3 C.-x2y4 D.-
- 化简:a÷a•1b.
- 计算:(-xy)2×(-xy2)-3÷(-xy4).
- 计算:(-1)0+(13)-1=______;(2y23x)3=______.
- 已知:a+1a=5,则a4+a2+1a2=______.
- 计算:(x-y)(x+y+y2x-y)=______.
- 计算:①2yx-yx+3yx=______;②4y3x•x2y3=______.
- 化简:(-x2y)2•(-y2x)3÷(-yx)4的结果是______.
- 计算:x2(x-2)2•x-2x=______.
- 计算:m+nm-n÷mn+m22m=______.
- 计算:(b2ax)2÷(-ax3b)×8ab3.
- 计算:x2-1x2+3x-10•x+5(x+1)2.
- 计算:2xy(x-y)2•x-y4y=______.
- 计算:x-1x2+3x+2÷x-1x+2=______.