x-3分之5-x方-9分之x-2+2x-6分之x-1=5/(x-3) -(x-2)/(x^2-9) +(x-1)/2(x-3)=(10(x+3) -2(x-2)+(x-1)(x+3))/2(x+3)(x-3)=(10x+30 -2x+4+x^2+3x-x-3)/2(x+3)(x-3)=(x^2+10x+31)/2(x+3)(x-3)