Simplify: 15 - [3 + {18 - 19 - 2)] = [1 + (5 - 3 - 1)]
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15- [3 + {18 - 19 - 2 }] = [1 + (5 - 3 - 1)]
15 - [3 + {18 - 17}] = [1 + ( 5 - 2)]
15 - [3 + {1}] = [ 1 + ( 3 ) ]
15 - [ 4 ] = [ 4 ]
11 = 4
==> 4 - 11
==> -7 is ur answer
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