计算:[(2x+1)/(x²+x-2)]-[(x-2)/(x²-4)]
计算:(1)x²/x-2 - 4x/x-2 + 4/x-2;
计算 ∫(x^4-2x^3+x^2+1)/x(x-1)² dx
计算(x²+4x-12/x²+x+1)(x²-1/x²-4x+4)(2-x/x&
2道分式计算[(x+4)(x-2)]/x³+2x²+x÷[(x-2)/x·(x+4)/(x+1)]2
计算:(1+1/x)·x²-2x+1/x²-1;(x²/x-1-2x/1-x)÷x/x-1
(x²-2x)分之(x+2)-(x²-4x+4)分之(x-1) 计算
计算5x(2x² -3x+1)
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
计算 x(x+3)-(x-1)(x-2)
化简{x²-2x分之x+2-x²-4x+4x分之x-1}除以X分之(x-1)(X-4)乘以(2-x)
[(x+2)/(x²+2x)-(x-1)/(x²-4x+4)]÷(x-4)/x
计算[(3X/(X-2))-(X/(X+2))]·((X²-4)/X)