(x-2)分之x÷[2+x-(2-x)分之4]
=(x-2)分之x÷[(x+2)+(x-2)分之4]
=(x-2)分之x÷(x-2)分之[(x+2)(x-2)+4]
=(x-2)分之x÷(x-2)分之(x²-4+4)
=(x-2)分之x÷(x-2)分之x²
=(x-2)分之x×x²分之(x-2)
=x分之1