{X|-10
《X-10)(X+7)
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2
x*x+2x+x*x+10x+x*x+25+2x+x*x+1+1+16+x*x+4x*x+9-12x+16x*x+4-1
解方程(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=1
化简|x-5|+|x+10|-|x-15|,
|x+5|+|x-7|+|x+10|化简
因式分解3x*x+11x+10
(2x^-5x+2/6x^+13x+6)*(6x^-5x-6/6x^-17x+10)*(12x^+8x-15/2x^-x
{X|-10
x+2x×10=10x+2x+36
[10x+(8-x)][(8-x)*10+x]=1855