Question

[ 20: ( - 10 . 2 ) ] - 3 + [ ( 6 - 7 ) . ( - 2 ) ] =

Answer 1

[20:(-20)]-3+[42.(-2)]
[-1] -3+[-84]
-4-84
-88

Answer 2

[ 20:-20] -3 + [(-1•-2)]
-1-3+2
-4+2
-2