(m*m-3m+2)-(4m-2n-1)初一数学题
(1)(m*m-3m+2)-(4m-2n-1)(2)(3+x2+4x-1)-3(x2+3x)(3)-5(x2-3)-2(3x2+5)(4)-(x2y+3xy-4)+3(x2y-xy+2)(5)(11/2x2-29x+10y)-(5/2x2-13x+24y)
(6)-1/4(2k3+4k2-28)+1/2(k3-2k2+4k)在字母后的是次方