(2/3+3)(3-2/3x)+(-2/3-1)(1+2/3x)
x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(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
1+x+x^2+x^3+.+x^99+x^100
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
(x-1)^3(x+1)(x-2)/(x+4)
(x+1)(x+2)(x+3)(x+4)+1
计算 x(x+3)-(x-1)(x-2)
(x+2/x+1)-(x+4/x+3)-(x+3/x+2)+(x+5/x+4)
x(2-1/x)+x/(x^2-2x)÷(3-x)/(x^2-4)
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
x(x+1)^3+x(x+1)^2+x(x+1)+x+1因式分解