计算2(-x^4 y)²×(-1/4xy³)
计算x²y³-2x(4xy³)
计算 2xy[4x²y²-3y(xy+x²y)-xy²]
计算(-3/2xy)(2/3x²-4xy²)+4/3y(3/4x³-1/2x³y
分解因式计算6x³y(x-y)³-4xy³(y-x)²
计算:(x-2y)(1+x+2y+4y^2+2xy+x^2)
计算:(3x³y)²*(4y)²÷(2xy)³
计算 (_2x²y³)²×(4xy²)-¹×(2x²y)
合并同类项并计算 -3[y-(3x²-3xy)]-[y+2(4x²-4xy)]其中,x=3,y=1/
计算:4xy-(x+y)^2/xy(x+y)(x-y)÷x^2+xy-2y^2/x^2y+2xy^2
【分解因式】 x²-xy+4分之1y² x²y-2xy²+y³ a(x
2x²y+{2xy-[x²y-2(﹣3x²y+xy)]﹣4xy²} 计算
计算:(-7x²y)(2x²y-3xy³+xy)