(1/x²+3x+2)+(1/x²+5x+6)+(1/x²+4x+3)
(x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
(1/x²+3x+2)+(1/x²+5x+6)+(1/x²+4x+3)
6x+(2x²-3x)-(x²-1)
x²+3x+9/(x²-27)+6x/(9x-x²)-(x-1)/(6+2x)
((x²-5x+6)/(12-7x+x²))²÷((x²+3x+2)/(x
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4
解方程:x(6-x)-2x(x+1)-(x^3-3x^4)/x²=4
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
(x+1)/(x²+3x+2)+(x²-2x)/(x²-4)
x(x²-1)+2x²(x+1)-3x(2x-5)计算
2X²-X=6,4X²-3X-1=X-2,3X(X-3)=2(X-1)(X+1),