(176-343)-243=176-343-243=-343-243+176=596+176=772
(684+915)-484=684+915-484=684-484+915=200+915=1115
(259+101)-59=259+101-59=259-59+101=200+101=301
1287+(487+164)=1287+487+164=1774+164=1938
971-(235+371)=971-235-371=971-371-235=600-235=365
5393-(1393+158)=5393-1393-158=4000-158=3842