题目先化简,再求值:3(x2y+xy2)−2(x2y−1)−23(x^{2}y+xy^{2})-2(x^{2}y-1)-23(x2y+xy2)−2(x2y−1)−2,其中x=−2x=-2x=−2,y=3y=3y=3.知识点：整式化简求值章节：数与式 / 整式
