Simplify these:
9-7x x-4
------- + ---------
x+7 x+7
7x 11x
----- - ------
x-7 x-7
9x 14x
----- - --------
x+9 x+9
3x-4 x-9
------- - ------
x +6 x +6
x-3 x-4
----- + --------
2x 6x
11 3
----- + ------
x+9 x-2
1 1
----- - -------
x²-x x
------- + ---------
x+7 x+7
7x 11x
----- - ------
x-7 x-7
9x 14x
----- - --------
x+9 x+9
3x-4 x-9
------- - ------
x +6 x +6
x-3 x-4
----- + --------
2x 6x
11 3
----- + ------
x+9 x-2
1 1
----- - -------
x²-x x