初一整式计算题

问题描述:

初一整式计算题

.3ab-4ab+8ab-7ab+ab=______. 2.7x-(5x-5y)-y=______. 3.23a3bc2-15ab2c+8abc-24a3bc2-8abc=______. 4.-7x2+6x+13x2-4x-5x2=______. 5.2y+(-2y+5)-(3y+2)=______. 6.(2x2-3xy+4y2)+(x2+2xy-3y2)=______....