1)R=+1
1 6 0 -7 -11 -4 -8 1

2)R=-8
-2 -8 -6 -15 -23 -21 -18 -12 -20 -32 -75 -8

3)R=1296
-24 -72 -216 432 432 1296

4)R=40320
-6 -6 24 120 720 -5040 40320

5)R=-138
(2)(-3)(4)(5)=-120
-120 -124 -119 -125 -118 -126 -117 -129 -105 -138

6)R=15/36

7)R=-84/8

8)R=2842/260
36/-24/77=2842/60

9)R=1344/560
((24/6))/(4/4))+(2/5)+3/4-16/7=
(96/24)+(2/5)+3/4-16/7=
192/120+3/4-768/360-16/7=
768/360-16/7=5376/5760=1344/5760

10)R=772/60
25/3-6/4-7/15=
162/10+25/3-6/4=100-18/12=160/12-7/15=2400-84/180=
2316/180=772/60

11)R=150/11
(322/33)+(5/4)=1610/132+9/6=9660+1188/792=
10848/792=1356/33=450/33=150/11

12)R=910/1265
((80/50)/(25/7)(13/6))/)12/7)+3/20
(80/50)(325/42)/(12/7)+3/4=
(26000/2100)/(12/7)=182000/25200+3/2=
364000/50600=7280/10120=1820/2530=910/1265