Question

计算[(x-1)/(x-2)-(x-2)(x-3)-(x-3)/(x-4)+(x-4)(x-5)]/(2x-7)

Answer 1

原式＝(38*x^2-116*x+110-4*x^3)/(x^2-6*x+8)

或原式＝-2*(-19*x^2+58*x-55+2*x^3)/(x-2)/(x-4)

快啊