gimana caranya tolong bantu

baris
1).
I. (a+b) = -3 + (-12) = -15
II. (a+b+c) = -15 + 13 = -2
III. (a x c) = -3 x 13 = -39
IV. (b x c) = -12 x 13 = -156
V. (ac x bc) = 6084
2).
I. -15
II. -1
III. -56
IV. -154
V. 8624
3).
I. 5
II. 20
III. -75
IV. 150
V. -11250
4).
I. 3
II. -13
III. -54
IV. -114
V. 7776
5).
I. 1
II. -16
III. 119
IV. -138
V. -16184