Răspuns:
[tex] \bf 2021 \cdot53-47 \cdot2021 +6 \cdot \: 2020[/tex]
[tex]\bf 2021 \cdot(53-47) +6 \cdot \: 2020[/tex]
[tex]\bf 2021 \cdot 6 +6 \cdot \: 2020[/tex]
[tex]\bf 6 \cdot (2021 + 2020)[/tex]
[tex]\bf 6 \cdot 4041[/tex]
[tex] \red{ \boxed{\bf 24 \: 246}}[/tex]
