(49-5)-(29-4) = 44 - 25 = 19
-(8-102)-(142-53) = -(-94) - 89 = 94 - 89 = 5
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(49-5)-(29-4) = 44 - 25 = 19
-(8-102)-(142-53) = -(-94) - 89 = 94 - 89 = 5