9\14+1\6 -9\14-1\6 9\14-1\6 -9\14+1\6

Question

9\14+1\6
-9\14-1\6
9\14-1\6
-9\14+1\6

Answer 1

(6*9+1*14)/84=68/84=17/21
(-6*9-1*14)/84=-17/21
(54-14)/84=40/84=10/21=0,21
(-54+14)/84=-40/84=-10/21=-0,21