if you could please take some time to answer these, thank you! (60 points)
1a. - 8 - 12 =

1b. -½ -½=

1c. -7 + 3 =

1d. 3 - 7 =

1e. 3x + 10x -7x +1 +9 =

1f. - 15 / -3 =

1g - 10/5 =

1h. Simplify - 3( -2x - 5) =

1i. .Simplify -4( 5x + 9) =

1j. Simplify -5 ( x -6) =