把多项式2xy2-x2y-x3y3-7按x作升幂排列是_.

问题描述:

把多项式2xy2-x2y-x3y3-7按x作升幂排列是______.

根据题意得:-7+2xy2-x2y-x3y3
故答案为:-7+2xy2-x2y-x3y3