数学：一、填空4a+6b,1/9的1001次方,1,1/9,x方-2xy+y方,x方+2xy+y方,-3x方+4x+8,ac+bc+ab,2,-3,(2a+3b),12ab-4a方-9b方,（x-1）（x+1）+1=x方,75 选择CDBAD 解答（一）7X+4Y,-a的5次方,-3/8a方b方+1/2a方b方-1/3ab方...
数学：一、填空4a+6b,1/9的1001次方,1,1/9,x方-2xy+y方,x方+2xy+y方,-3x方+4x+8,ac+bc+ab,2,-3,(2a+3b),12ab-4a方-9b方,（x-1）（x+1）+1=x方,75 选择CDBAD 解答（一）7X+4Y,-a的5次方,-3/8a方b方+1/2a方b方-1/3ab方...