HELP PLS IVE ASKED THIS LIKE 3 TIMES ALREADY!!!!

Simplify:
1. ½(2r + 4) - ¼(16 - 8r)
2. (8x - 3) - (2x + 6)
3. (2 - 7y) - 3(y - 9)
4. 2(3x - 4) - (2x - 5)