作业帮化简：[(x+2)/(x^2-4)-(2x-5)/(x-4x+4)]÷[(x-3)/(x-2)]
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
x(2-1/x)+x/(x^2-2x)÷(3-x)/(x^2-4)
通分x+4/x*x+4x与x-5/x(x-5)-2(x-5)
约分 (X的平方+4x+3)(2x-x)^/(X^+X)(X^+X-6),
2x+3x+4x+5x+x+6x+7x=100
已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值
化简：[(x+2)/(x^2-4)-(2x-5)/(x-4x+4)]÷[(x-3)/(x-2)]
3x/(x-2)-x/(x+2)÷2x/(x-4)化简
化简3x^2(x-1)-3x(x^2+1)+4x(2X-5)