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a) -20+[-145+(-136+139)+144];b) -32+{-16-[-60+(-35)-(-14)]-(+64}-(+34) ;c) (-24)+[-3+2|+|-16+3+15|; d) (-15+43)+[(+16)-(+54-29)+(18-35+24]; e) -(-24)+{[(-28+56)-(+16)]+[-48+(-32+47)+(-36]};​