Question

关于合并同类项并且有大中小括号的数学题

求30道左右。。。。拜托了。。。。TOT

Answer 1

(x+5y)-(3y-4x)=x+5y-3y+4x

1/2(x6^2-y)+1/3(x-y^2)+(x^2）（^为平方号）

10a+6b-7a+3b-10a+10b+12a+8b

4xy-2y+3x-xy

(3x-5y)-(6x+7y)+(9x-2y)

2a-[3b-5a-(3a-5b)]

(6m2n-5mn2)-6(m2n-mn2)

(5x-4y-3xy)-(8x-y+2xy)

a-(a-3b+4c)+3(-c+2b)

7x2-7xy+1

6-5b-(3a-2b)-(1-6b)

(5x-4y-3xy)-(8x-y+2xy)

(3x2-4xy+2y2)+(x2+2xy-5y2)

(x-y)2-(x-y)2-[(x-y)2-(x-y)2]

(2k-1)x2-(2k+1)x+3

2(x-2)-3x-2

2y-3y+1-6y

3b-6c+4c-3a+4b

2a-5b+4c-7a+5a+5b-4c

4a+6c+7a-6a+7b-3c-6b

5b+2c-7b+4z-3z

3b+3c-6a+8b-7c-2a

3c-7b+5z-7b+4a-6n+8b-3v+9n-7v

5a－3b－a+2b；

－3x2+7x－6+2x2－5x+1；

a2b－b2c+3a2b+2b2c；

－a2b－ab2+a2b+ab2；

2a2－3b2－6+5b2－2a2+7．

Answer 2

1.5(2x-7y)-3(4x-10y)
2.3a²-[4ab²-5(ab²+5/3a²b)-3/2ab²]-a²b
3.4（x²+2y²）-｛（x²-2xy+y²）+[x²-（2xy-2y²）]｝
4.2m-｛n+[4m-3(m+2n)+6m]-5n｝
5.5a²b-[2a²b-3(2abc-ac²)-5ac²]
6.4x²y-｛x²y-[3xy²-2/1(4x²y-8xy²+x²y]｝-5xy
7.3x^3-[x^3+(6x^2-7x)]-2(x^3-3x^2-4x)
8.(3x^2-4y^2)+[-(x^2-2xy-y^2)]-[-(3x-2xy-y^2)]