Đáp án`+`Giải thích các bước giải:

`12+325+653+325+365454125+6541235462365`

`=` `337+653+325+365454125+6541235462365`

`=` `990+325+365454125+6541235462365`

`=` `1315+365454125+6541235462365`

`=` `365455440+6541235462365`

`=` \(6541600917805\)

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