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4080400+2019^{2}-2020\times 4038
Calculate 2020 to the power of 2 and get 4080400.
4080400+4076361-2020\times 4038
Calculate 2019 to the power of 2 and get 4076361.
8156761-2020\times 4038
Add 4080400 and 4076361 to get 8156761.
8156761-8156760
Multiply 2020 and 4038 to get 8156760.
1
Subtract 8156760 from 8156761 to get 1.
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