(x²-7x)-(3x²-5-7x)化简
(x-2)(x-3)+2(x+6)(x-5)-3(x²-7x+13)化简
(x²-7x)-(3x²-5-7x)化简
(1/x²+x)+(1/x²+3x+2)+(1/x²+5x+6)+(x²+7x+
解方程.(5x/x²+x-6)+(2x-5/x²-x-12)=7x-10/x²-6x+8
(3x²)³-7x³[x³-x(4x²+1)]
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
化简 (3x/x-1 -x/x+1)÷x/x²-1
化简:3x²-【7x-(4x-3)-3x²】
解分式方程1/(x²+3x+2)+1/(x²+5x+6)+1/(x²+7x+12)1/(x
(8-7x-6x²+2x³)+(x³+5x²+4x-1)-(-x²-3
计算:(-x³-3x²+7x-8)-(3x³-2x²-5x+4)-(-x
(x+2)(x-3)>(-x-3)² -1 (2x-5)(2x+5)<(x-3)(4x+7)