Đáp án`+`Giải thích các bước giải:

`21 . 32 . 43 - 21 . 32 . 43 - 21 . 32 . 3`

`= (21 . 32 . 43 - 21 . 32 . 43) - 21 . 32 . 3`

`= 0 - 21 . 32 . 3`

`= 0 - 2016`

`= -2016`

$\color{#1c1c1c}{\text{G}}$$\color{#2a2043}{\text{o}}$$\color{#291063}
{\text{d}}$$\color{#53008}{\text{M}}$$\color{#6b28ac}
{\text{a}}$$\color{#8c4ebd}{\text{t}}$$\color{#B592D6}
{\text{h}}$$\color{#ceaedf}{\text{s}}$