3ï¼3ab-4ab+8ab-7ab+ab=______ï¼
4ï¼7x-(5x-5y)-y=______ï¼
5ï¼23a3bc2-15ab2c+8abc-24a3bc2-8abc=______ï¼
6ï¼-7x2+6x+13x2-4x-5x2=______ï¼
7ï¼2y+(-2y+5)-(3y+2)ï¼______ï¼
11ï¼(2x2-3xy+4y2)+(x2+2xy-3y2)=______ï¼
12ï¼2a-(3a-2b+2)+(3a-4b-1)=______ï¼
13ï¼-6x2-7x2+15x2-2x2ï¼______ï¼
14ï¼2x-(x+3y)-(-x-y)-(x-y)ï¼______ï¼
16ï¼2x+2y-[3x-2(x-y)]=______ï¼
17ï¼5-(1-x)-1-(x-1)=______ï¼
18ï¼( )+(4xy+7x2-y2)=10x2-xyï¼
19ï¼(4xy2-2x2y)-( )=x3-2x2y+4xy2+y3ï¼
21ï¼å·²ç¥A=x3-2x2+x-4,B=2x3-5x+3,计ç®A+B=______ï¼
22ï¼å·²ç¥A=x3-2x2+x-4,B=2x3-5x+3,计ç®A-B=______ï¼
23ï¼è¥a=-0.2,b=0.5,代æ°å¼-(|a2b|-|ab2|)çå¼ä¸º______ï¼
25ï¼ä¸ä¸ªå¤é¡¹å¼åå»3m4-m3-2m+5å¾-2m4-3m3-2m2-1,é£ä¹è¿ä¸ªå¤é¡¹å¼çäº______ï¼
26ï¼-(2x2-y2)-[2y2-(x2+2xy)]=______ï¼
27ï¼è¥-3a3b2ä¸5ax-1by+2æ¯å类项,åx=______,y=______ï¼
28ï¼(-y+6+3y4-y3)-(2y2-3y3+y4-7)ï¼______ï¼
29ï¼åç®ä»£æ°å¼4x2-[7x2-5x-3(1-2x+x2)]çç»ææ¯______ï¼
30ï¼2a-b2+c-d3=2a+( )-d3=2a-d3-( )=c-( )ï¼
31ï¼3a-(2a-3b)+3(a-2b)-b=______ï¼
32ï¼åç®ä»£æ°å¼x-[y-2x-(x+y)]çäº______ï¼
33ï¼[5a2+( )a-7]+[( )a2-4a+( )]=a2+2a+1ï¼
34ï¼3x-[y-(2x+y)]=______ï¼
35ï¼åç®|1-x+y|-|x-y|(å
¶ä¸xï¼0,yï¼0)çäº______ï¼
36ï¼å·²ç¥xâ¤y,x+y-|x-y|=______ï¼
37ï¼å·²ç¥xï¼0,yï¼0,åç®|x+y|-|5-x-y|=______ï¼
38ï¼4a2n-an-(3an-2a2n)ï¼______ï¼
39ï¼è¥ä¸ä¸ªå¤é¡¹å¼å ä¸-3x2y+2x2-3xy-4å¾
2x2y+3xy2-x2+2xy,
åè¿ä¸ªå¤é¡¹å¼ä¸º______ï¼
40ï¼-5xm-xm-(-7xm)+(-3xm)=______ï¼
41ï¼å½a=-1,b=-2æ¶,
[a-(b-c)]-[-b-(-c-a)]ï¼______ï¼
43ï¼å½a=-1,b=1,c=-1æ¶,
-[b-2(-5a)]-(-3b+5c)ï¼______ï¼
44ï¼-2(3x+z)-(-6x)+(-5y+3z)=______ï¼
45ï¼-5an-an+1-(-7an+1)+(-3an)ï¼______ï¼
46ï¼3a-(2a-4b-6c)+3(-2c+2b)=______ï¼
48ï¼9a2+[7a2-2a-(-a2+3a)]=______ï¼
50ï¼å½2y-x=5æ¶,5(x-2y)2-3(-x+2y)-100=______ï¼
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