计算.3X³-2X²-y²+5y+X²-5y+y²

计算4（x+y）^5（x-y）^4÷[2（x+y）³*（y-x）²] 计算：(x+2y)(3x-5y)-(6x的四次方y²-2x²y²）÷（2x²y& 计算：（x-y）的5次方（x-y）²（x-y）³ (x-y)·2(x-y)²·3(x-y)³ 计算 计算 [12(x+y)³(y-x)]³÷[4(x+y)²（x-y)]² 计算3x[xy-2x(1/y-x/3]+3y(x²-y²) 因式分解 -5x³y(x-y)³+20y【x²（y-x）】² 合并同类项：-6x²y-x+5x²y-2x+x³y+3x 计算(x²/x+2y)-x+2y-2 5x[x-3y]²+2y[3y-x]³因式分解, (x+y)²+4(x+y)-5 (3x-y)²-2x（4x-5y）-（x+2y）²