关于合并同类项并且有大中小括号的数学题
问题描述：
关于合并同类项并且有大中小括号的数学题
答
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)]
答
(x+5y)-(3y-4x)=x+5y-3y+4x1/2(x6^2-y)+1/3(x-y^2)+(x^2）（^为平方号）10a+6b-7a+3b-10a+10b+12a+8b4xy-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...