¼x³y²·﹙﹣2xy²﹚+﹙-2x²y﹚·﹙-½xy﹚·3xyz

问题描述:

¼x³y²·﹙﹣2xy²﹚+﹙-2x²y﹚·﹙-½xy﹚·3xyz

¼x³y²·﹙﹣2xy²﹚+﹙-2x²y﹚·﹙-½xy﹚·3xyz
=-½x^4y^4+3x^4y³z