Simplify the complex rational expression

Please help me simplify this complex rational expression 1-(4/x+2)÷1-(1/x-1)=

placement of parentheses can make a huge difference, for example you wrote this: 
1-(4/x+2)÷1-(1/x-1) 
which converts to 
 
but I think you meant to write: 
(1-4/(x+2))/(1-1/(x-1)) 
which converts to 
} 
simplifying...