901-71-598= 321+33-26=
999-52-658= 865-243+192=
893+329-363= 528
144+713+39= 913
677-191-190= 383
+72+380= -243-43= +318-415= 1
899-466+222= 950-16-624= 293+136+526= 916-109-254=
948-159+49= 76 743-248+445= 957
863-146+67= 74
+779-746= -11-568=
+688+148= 2
965-76-226= 663-266+457=
600+372+24= 684+355-343=
672-668+51= 542
659+198-108= 537
438+90+178= 175
+257-92= +183-281= +57+164= 3