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(56:7+36:6+26):(8x5:4+42:6-13)=


Răspuns :

(8+6+26):(40:4+7-13)=
40:(10+7-13)=
40:4=
10
(8+6+26) : (40:4+7-13)=
(14+26) : (10+7-13)=
40 : (17-13)
40: 4=10