-1/2x²·(2/3y²-1/3x+1/4)计算
计算3x[xy-2x(1/y-x/3]+3y(x²-y²)
计算(2x-3y)²-(4y-3x)(4y+3x) (x+3)²-2(x+5)(x+1)+(x-2)
数学用乘法公式计算(x+y+1)(x+y-1)(2x-y-3)²
计算(x+4)·(-2x)-(x+1)(x-1)+(-3x+2)(x+1); (3x-y)(y+3x)-(4x-3x)(
计算6x³y^6÷(1/2)y³÷(-3x²y)-(12x^4y^6-8x²y^
计算:1/(x-y)-1/(x+y)-2y/(x^2+y^2)-4y^3/(x^4+y^4)-8x^7/(x^8+y^8
分解因式计算:x^2(x-y)+(y-x)=?x^3+x^2+1\4x=?(2x+y)^2-(x-2y)^2=?
-1/2x²·(2/3y²-1/3x+1/4)计算
(1)计算:a-(a^2)/(a+1)-1 (2)计算:3x/(x-4y)+(x+y)/(4y-x)-7y/(x-4y)
(2x+y)(x+3y-1)计算
计算:3x-(4y-2x+1)
计算:[(-3x²y∧4)²·x²-2x(3x²y²)³·1