Divide. `(x^2 - 4)/(x^2 + 8 x - 20)-:(8 x)/(x + 10)`

State the quotient in simplest form.

`(x^2 - 4)/(x^2 + 8 x - 20)-:(8 x)/(x + 10)=`

Enter the numerator and denominator separately in the boxes above. If the denominator is 1, enter the number 1. Do not leave either box blank.