Find the value of 83 - [59 - (22 - 18)].

83-[59-(22-18)]

22-18=4

59-4=55

83-55=28

$${\mathtt{83}}{\mathtt{\,-\,}}\left[{\mathtt{59}}{\mathtt{\,-\,}}\left({\mathtt{22}}{\mathtt{\,-\,}}{\mathtt{18}}\right)\right] = {\mathtt{28}}$$