计算,(x+3)²-(x-1)(x-2)
计算 x(x+3)-(x-1)(x-2)
计算5x(2x² -3x+1)
计算 ∫(x^4-2x^3+x^2+1)/x(x-1)² dx
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
计算3x²-[5x-(1/2x-3)+2x²]
计算:3x²-[5x-(1/2 x-3)+2x²]
计算(-x³+2x²-5)(2x²-3x+1)
计算(x³-x+1)/(x²-1)-(x²+x)/(x-1)+(2x+3)/(x+1)
x^2-1/x^2+4x+4÷(x+1)×x^2+3x+2/x-1计算
计算:(1+1/x)·x²-2x+1/x²-1;(x²/x-1-2x/1-x)÷x/x-1
分式计算:x分之x²-1乘x+1分之x+(3x+1)
计算:(1)x²/x-2 - 4x/x-2 + 4/x-2;