计算:(x-2)²÷(2-x)=
计算:2x/(x-2)(x+1)÷(1-x/x+1)-x²+2x/x²-4?
计算2x/(x³-1)÷1/(x²+x+1)=
计算:(1+1/x)·x²-2x+1/x²-1;(x²/x-1-2x/1-x)÷x/x-1
2道分式计算[(x+4)(x-2)]/x³+2x²+x÷[(x-2)/x·(x+4)/(x+1)]2
计算:(2-5x)/6-x/3
计算:3x²-[7x-(4x-3)-2x²]
计算5x(2x² -3x+1)
(x³-1)÷(x-1)=?(9x³-6x²-5x+2)÷(3x-1)=?计算
计算 x(x+3)-(x-1)(x-2)
计算:(1)x²/x-2 - 4x/x-2 + 4/x-2;
计算:[x(-4X+3)+(X-2)x]÷(-X)
计算 ∫(x^4-2x^3+x^2+1)/x(x-1)² dx