Answers

2016-04-04T20:17:32+05:30
-6[2*5-1]
-6[2*4]
-6[8]
-48

i'm getting -48

1 5 1
2016-04-06T17:23:27+05:30
-6[2 × 5 -(-1) × (-1)]

BODMAS rule -

-6 [ 10 - 1]
-6 × 9
-54
0