`M``=` `[``(``5²``.``2³``-``7²``.``2``)``:``2``]``.``6``-``7``.`$2^{5}$
`=` `[``(``25``.``8``-``49``.``2``)``:``2``]``.``6``-``7``.``32`
`=``[``(``200``-``98``)``:``2``]``.``6``-``224`
`=``[``102``:``2``]``.``6``-``224`
`=``51``.``6``-``224`
`=``306``-``224`
`=``82`
Vậy `M``=``82`.