-(9x²-4x²+5)-(-3-8x³+3x²)
-(9x²-4x²+5)-(-3-8x³+3x²)
(8-7x-6x²+2x³)+(x³+5x²+4x-1)-(-x²-3
计算:(-x³-3x²+7x-8)-(3x³-2x²-5x+4)-(-x
解方程:(x²+3x)/(2x²+2x-8)+(x²+x-4)/(3x²+9x)
9x+6x²-3(x-2/3x²),其中x=-2 1/4(-4x²+2x-8)-(1/2x
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
(3x²)³-7x³[x³-x(4x²+1)]
不等式|(x+3)/x|>(x+3)/x,不等式(x²-9)/(x-2)>0
化简:-3x(x²+1)-[x³-x(4x²+1)].
3X+(X+2)+(X+1)*(X-1)=4*(X²+8)
3x²+4-5x²)+(-x³-3+2x²)化简
3x²+【5x-2(4x-5)-9x²】=?