作业帮(3/4x²-1/3xy²+1/2x²y-2/5y³)+(y³+1/2xy ²-1/3x²y-5/4x³)=
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/15 04:43:35
(3/4x²-1/3xy²+1/2x²y-2/5y³)+(y³+1/2xy ²-1/3x²y-5/4x³)=
(3/4x²-1/3xy²+1/2x²y-2/5y³)+(y³+1/2xy ²-1/3x²y-5/4x³)=
(3/4x²-1/3xy²+1/2x²y-2/5y³)+(y³+1/2xy ²-1/3x²y-5/4x³)=
