计算:(5x-3)(5x+3)-3x(3x-7)
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
计算:-x+(2x-2)-(3x+5)
计算:/3-x/+/x-1/(x>5).
计算5x(2x² -3x+1)
计算:5x²-[3x-(4x-3x)-2x²]
计算:(5x-3)(5x+3)-3x(3x-7)
(2x+7)×(3x-4)+(3x+5)×(3x-2)计算
x/x-3-5x/x^2-x-6计算
计算 x(x+3)-(x-1)(x-2)
分式计算:x^5-4x^3+x+2/x^3+6x^2+12x+8(约分)
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
计算:(-x³-3x²+7x-8)-(3x³-2x²-5x+4)-(-x